[Phalanx]

Yeah, for simplicity, and stuff that usually goes down well crowd-wise, I'd go with something to do with tandoori. It's tasty, can be made mild to spicy, and to make an authentic recipe (no packet shit), it's really quite easy, and definately within your time constraints. Addition of the salads, and the "wraps" is a really simple, healthy, good thing to throw out onto a table, and let everybody dig in (just make sure you use implements for those people that don't "get" that you shouldn't just attacj everything with your hands.
We know some pretty good (from scratch) recipes for all this stuff including the salads, and the raita, when made right....is just fucking unbelievable.

Otherwise, I know how to throw together a few good thai items, some asian/chinese stuff, pretty much a bunch of different "crowd" food. Pastries, assorted salads, some sauces from scratch (a bit more time consuming though)...look, essentially what you want, we can come up with.
But...if you want it easy, I'd go with suggestion #1.
I mean...I can come up with full set meals that'll have these people thinking you're a chef...but the time thing, and people power at your disposal (just you right?) doesn't really make that a possibility.
With the aforementioned, all you have to do is crush up a paste (I'll throw you the recipe) or two, marinade overnight, chop some things up, and make things nice and presentable. Easy.
If you're after any dessert suggestions, might be able to help there too.

- B