I have used their website to find information on plumeria varieties because they have a quite extensive library of some 240 pictures and description (some very beautiful varieties too) but I haven't ordered from them. I'd be interested in hearing about somebody's experience with them as well.
A minimum order of $100 shouldn't be hard to fill if you combine orders with a friend!

If you just g**gle "heliconia paradise" a gardenweb review pages comes up with three glowing reviews, though none very recent. Looks like they wholesale; I found a page of unrooted cuttings with a 50 piece minimum at $2.10-2.75 each.

They do have a very thorough index of Thai descriptions, quite useful. Nice photos, too.