The Slim PS3 not available in less than 120 GB and all PS3 have the capability of online play. One of the first PS3 a 20 GB model just did not have built in WiFi, but you could use an Ethernet cable or buy the 60 GB model with WiFi.
Yes, PS3 Slim can play Rock Band.
The first PS3 had 4 USB ports and they were backward compatible all the Fat PS3 with 2 USB ports lack both the hardware and the software to play PS2 games. The PS3 slim also does not have this feature, but it was lost more than a year before the PS3 slim was released back in 2008 and even in November 2007 for the 40 GB model YES as long as the ps3 is not the ps3 SLIM because the people who buit the ps3 SLIM did not do it but on the NOT SLIM ps3 you can feel free to do so. Totally untrue
The fat ps2's in my opinion play better than the slimline ones
The PS3 slim and most of the fat PS3s do not play PS2 games and there is nothing that will change that. If you do not have a PS3 with a Card reader and 4 USB ports you will never be able to play PS2 games on it, except the few PS2 games sold at the Playstation store and already converted into PS3 games
The longer electronic items are made the cheaper they are to produce. That is one reason the PS3 is now selling for the USA retail price of $299.99 for the PS3 slim 120 GB model when a few years ago Sony was selling the PS3 for twice that and losing over $200 a unit. see related links.
Yeah... Obviously
Yes, PS3 Slim can play Rock Band.
Yes they can and they can also play on the new slim released in May 2010. They really are only PS3 games and not games for the slim or fat PS3
Yup, the ps3 slim will play ps3 games. It is the same as a normal ps3 but has a slimmer look to it but most regular ps3s has more memory.
The PS3 slim will not play PS2 games with full backwards compatibly.
None the PS3 slim does not play PS2 games
Yes you can, and it won't mess up your PS3 Slim warranty either.
Yes a wireless broadband connection or an ethernet cord
yes
ps3 slim is not as big as the original. however you cannot play ps2 games on it.
All PS3 models can play PS3 games and also select PS1 games
yes.