I just got the NEX-3 for my birthday a couple of weeks ago!
While I can't speak on the Panasonic, I love my NEX-3...BUT now I want the NEX-5 knowing that I can't use a wireless remote with my NEX-3 but the NEX-5 has the IR remote capability!
I have yet to buy lenses for my NEX-3 but I've been having fun with the wide angle lens it came with. Distortion can be pretty noticeable in some pictures though. But it's a fun camera! I love how portable it is! I used to have a Canon Rebel XS and it's so nice not to be lugging around a bulky DSLR - although I'd still like to have a DSLR on hand for the occasional photoshoot.