As announced on Konami's Pre-E3 show, the Metal Gear Solid series will have a HD remake both on the 360 and the PS3, with Metal Gear Solid 2: Sons of Liberty, Metal Gear Solid 3: Snake Eater and (presumably as part of the PSP Remaster series), Metal Gear Solid: Peace Walker.
Now all games will feature graphics up to 1080p, and since the PS3 will get a PSP game, save data can be "Transfarred" (that's how it's spelled) between the two platforms.
Same for the Silent Hill and Zone of the Enders games (ZoE will have "Transfarring" too), but those will release in 2012.
Excite!