It comes with Overlord, Kasumi's Stolen Memory and Lair of the Shadow broker on the disc. You get a code for a free download of the Cerberus Network, and there is an armor pack (can't remember the name) that is free on PSN. The armor is well worth the download...it's saved my ass a few times already

I thought the comic book intro for ME1 data was a download as well, but I couldn't find any information, so I just started playing, and was a bit miffed about it. Turns out, it's also on disc, and plays out like a 'life flashing before the eyes' flashback after the "initial stuff happens" in ME2 (won't ruin it for you)
I've noticed some subtle differences in the character that take part in certain scenes, compared to the 360 version. It's nothing major, and is really only to provide continuity with the lack of any real character-carryovers from ME1. I didn't finish my downloads before my initial start of ME2, and the intro movie contained some information that was incorrect after I stopped and waited till the download was done. Choices that are available after the download completes changes the intro movie dialogue a bit...which now makes me think the comic book was actually part of the Cerberus download...
At ay rate, get it and I'll shut up about it
