The PS3 slim should be announced at Gamescom which is this month. That said why not build yourself a gaming PC? Mass Effect 2 will be coming there as well as most other games releasing on games consoles.
People whom are part of the gaming industry keep on hinting an early September release for the console so simply wait a few weeks and if there is no information then a lot of people will have egg on their face. PS3 Slim is pretty much the worst kept secret in gaming right now above a GT5 release this year and the PSP Go.
So PS3 slim very soon, just wait a couple more weeks. Personally I would say you should build yourself a gaming PC.
Edit - It seems dsister44 is of the fanboy persuation so it would be best if you did not listen to what he has to say.
