"is it possible to have a slim ps3?"
Stupidest question ever..no, really, it is.
Of course its possible..the HDD is NOT big, the disc player is NOT big (they have laptops with blu-ray drives..it can't be that big), and the processors are always being shrunk..is it really amazing that they'd do it with the PS3?
A slim PS3 will probably be the same size as the original PS2 would be my guess..or somewhere in that area. And it'd be a helluva lot cheaper to make, ergo price cut.
However, I don't know if they'd release one that soon, but the rumors all along have said March 09, and if this debuts at $300, it makes a lot of sense. Lets see how much steam this rumor gains, because when multiple rumors coincide, things are always a LITTLE more believable. None-the-less, they're still rumors..and I'll have to see it to believe it.