Your lucid list is very useful. Thank you very much.
Here are some (sorry, non-horticultural) comments:
>1  N.adnata Tamin & Hotta ex Schlauer & Nerz.
>        Illustration?  Jan will you be illustrating this in Blumea?
No. A fair illustration is included in TAMIN & HOTTA4s original
publication. NB: I would rather see this name published validly before it
is spread through the internet ;-)
       
>5  N.aristolochioides spec.nov.           Mt.Kerinci, Sumatra.
>        Description and illustration.
>        Fantastic pitchers with laterally opening mouths.
Are you really sure? I have seen Meijer 7426, and it seems the pitchers are
just compressed along their longitudinal axes. I think the peristome is
still rather horizontal in vivo (do not forget it functions as a gliding
zone, directing prey *into* the pitchers, not past them!). Do you know this
taxon as a living plant?
            
>8  N.bongso Korth.                        
>        to incl.  N.carunculata.
I am not sure if all colleagues will agree. I do accept it (however, I have
not seen enough authentic material to be able to propose this myself).
>11 N.brachycarpa Merril     
Is it different from _N.philippinensis_?
             
>13 N.burkeii Mast. 
I think the correct orthography should be _N.burkei_ ("e" is a vowel).
               
>19 N.diatas spec.nov.                       
>        Description, Illustration.  
>        Northern Sumatra.  Higher altitude, more woody than N.densiflora,
>different pitcher shape.
I have attributed this to _N.singalana_ s.lat., but it is certainly a
rather striking population (with some even more striking individuals, but
cf. also the very abnormal pitchers of _N.spectabilis_ in some material
from G.Bandahara!).
>24 N.glabratus Turnbull & Middleton 
"glabrata", _Nepenthes_ is female!
>25 N.gracilis Korth.                  
>        to incl.  N.neglecta 
Oh, really?! I think _N.neglecta_ belongs to the _N.hirsuta_-complex
(together with _N.leptochila_ and _N.mollis_).
>27 N.gymnamphora Reinw. ex Nees 
>27a  N.gymnamphora ssp. tomentella (Becc.) stat.nov. - Sumatran subspecies
>        Description, Illustration.  This differs in its lower pitcher
>        form, and its reluctance (?) to produce upper pitchers.  A neat
>        geographical split makes the construction of a sub-species 
>        delimitation seem like a natural thing to do.  What do the rest
>        of you think?
>        Incl. N.rosulata, p.p.N.pectinata (viz. Schlauer & Nerz in press)
I do agree. However, I do not know if the genus is understood sufficiently
to propose infraspecific classification. If you think so, I have some
further suggestions...
 
27b: Did you ever see material of _N.gymnamphora_ from S Borneo? Is this
perhaps _N.borneensis_?
>28 N.hamatus Turnbull & Middleton
"hamata", _Nepenthes_ is still female!
          
>        The priority of this name over N.dentata by 21 days is in fact in
>        serious doubt, since the `preprinted' Reinwardtia issue was 
>        technically not `freely available' in terms of the Botanical
>        Code.  However since it has entered more common usage (?) we will
>        probably retain it.  What do Nepenthes growers feel about this ?
I do not know what _Nepenthes_ growers do think about it. Some of them even
suspect _N.hamata_ to represent a hybrid involving the "good" species
N.dentata, but as TURNBULL & MIDDLETON do include the type of N.dentata as
a paratype of their _N.hamata_, I think this kind of thought is not
necessarily too significant. However, the question of priority should
indeed be considered thoroughly. I have not been able to determine when the
REINWARDTIA paper was really published effectively. I accept it was
published *after* KURATA4s paper in the JOURNAL OF THE INSECTIVOROUS PLANT
SOCIETY (JAPAN), and *before* his paper in GARDEN4S BULLETIN (SINGAPORE).
>32 N.infundibuliformis Turnbull & Middleton
Should, IMHO (cf. comment under no.28), be replaced by the name _N.eymae_
KURATA.
                          
>34 N.junghunii Ridl.                         
>        Emended description, Illustration.
A rather dubious species based on insufficient specimens. Has this been
recollected in recent time?
>46 N.mollis Dans. 
>        Little known. No pitchers.
I suspect it could be related to _N.hirsuta_.
>50 N.northiana Hook.f. 
>        to incl.  N.decurrens
Very good! ADAM, WILCOCK & SWAINE do think the same. So do I. Have you been
able to spot the locus classicus of N.decurrens ("Barram")? As far as I
know this is a fairly long river, and possibly the name of some geographic
unit.
>56 N.rafflesiana Jack 
>        Incl. 
It does not include:
>57 N.rajah Hook.f. 
, does it? I fear some text has been deleted here... ;-)
>Apart from changes to the Thai taxa(...)
What do you want to change in Indochina? How about SCHMID-HOLLINGER?
Kind regards
Jan