There you go – and here you go. Respectively: a screenshot of the GTA IV PS3 Bundle and the link to it so you can buy it. The bundle is a 40GB PS3 with GTA IV (and with all the usual stuff that comes with a 40GB, we presume) – it costs £319.99 and will be delivered on GTA IV’s launch day.
Considering GTA IV on the PS3 has already sold 3 to 1 against the 360 version according to some retailers, this can only increase that lead. Now, go forth and buy!