Capcom goes where the money is at. SONY got the exclusives when they were clearly market leader. Now it's multiplats for capcom.
If you're talking publishers I'd rule out:
Square Enix[look at where there games are going this gen]
Namco [SONY only get's exclusive from them because SONY has stake in that company]
Capcom [Above reasons]
Activision [Uhhh...]
Ubisoft [I just don't see it]
Konami [Really, they only make reasonable decisions with where they put their games. MGS4 was just the company letting Kojima call a few shots and Kojima wanting to keep his fans happy]
Lucas Arts [I just don't see it]
Atari [They lay things out pretty even]
Take-Two [Just haven't seen much from them. Their's Agent, but really just one game...]
Microsoft [Listed for the lulz]
Bethesda [Late DLC, weaker ports]
Warner Bros. [They like Blu-Ray 
, no special attention to the PS3 though 
]
MTV Games [Lol]
THQ [HD or Wii dev]
Midway [Multiplat Dev]
Disney [Seem to favor the Wii]
This leaves:
Atlus [Seems to like the PSP alot. Also they don't mind pleasing a few PS3 fans]
NiS [their games go to either PS3 or PSP, rarely DS]
Level-5 [Their games to to PS3 or handhelds]
SEGA [One of few companies willing to dish out some PS3 Exclusives]
Tecmo Koei [Sigma/2, Quantum... Just the fact that they show so much interest in the System]
Gust [Altus like reasons]
4 ≈ One
