they are most likly doing it in 3d max because one can obtain a trial full version of max and with maya u can only get a personal learning edition, so its not unfair its just the smarter thing to do.
ACTUALLY, there is a trial version of max5 which is fully fuctional for 31 days,
it was specially for a UK magazine
[edit] it was specially for people that buy that magazine[/edit]
yes u used to be able to get the max 5 one off of discreets website but they took it off when 6 came out. So im sure u can find the trial somewhere on the internet
if worse comes to worse and hek comes out and gearbox announces that max 6 will not be able to be used then i will contact discreet to see if i can put the max 5 demo up for download on my site (www.3ducation.com) because i still have it but only if gearbox says that they wont be making a plugin for max 6