ICO, Shadow of the colossus, and the last guardian are all in the same series. it just that people don't think of them that way becuz they don't share story, characters, or much of anything except the world they are in
Its a site that you will continually go back to. The answers section is the perfect place to go when your stuck in a game. The events section is a place to see what everyone is playing over the weekend. Plus the site is still being tweaked to its perfection. I loved it when I joined it and I'm still loving every day.
I don't know if you remember this but Square and Sony saved each other back on the PS1 with FF VII and well, the PS1. They are practically best friends with MS just getting some of the friendship. Square is essentially just putting games on the Xbox 360 because the 360 has higher sales (although it won't be revealed how many are second or third or fourth 360's for RRoD sufferers). Square is its own publisher too so they wouldn't give up their own rights and freedom to go with MS. Just throwin...
Like many of you have already said, ICO and Shadow of the Colossus are in the same series to the loosest sense with The Last Guardian being the end to the trilogy. So, the list already is bad right there. Also, Sly Cooper is most likely going to show up on PS3. There was a rumor that Sly 4 is being developed and will have a PSP/PS3 launch.