Webhallen.com is listing a PS3 bundle for GTA IV at 4,499 SEK ($755). Engadget notes that there doesn't appear to be anything special about the bundle, unlike the not-sold-in-stores Xbox 360 GTA IV special edition.
We contacted Sony America who said that while it can't speak for Europe, "SCEA hasn't announced any GTA PS3 bundle." We've contacted Sony Europe to confirm the legitimacy of the listing and asked if there's anything special inside the box. We'll update
Update: UK retailer Shopto has confirmed to GI.biz that the bundle will go on sale the same day as the release of GTA IV, April 29th.