I have been using the Logitech K400 and can highly recommend it. It even worked out of the box with my Android device. It is very light, compact, has good wireless capabilities, and has a good touchpad with multi-touch that works reasonably well. It is also a full-sized keyboard. Reasonably priced too for a wireless keyboard with an integrated touchpad.
Drawbacks - no backlighting, build quality is not rock solid (in fact a bit flimsy) but not horrible either - especially at the price.
I just read an article a few days back that talked about a successor to the K400 that is also backlit (but also double the price). But I can't seem to find the article. Maybe because it is pre-release.