I would have to say Capcom. Sega seems to be doing a good amount, from what other people have said.

Question, what games has Hudson brought to the Wii? I've never heard of them (or perhaps I have, and don't realize it?).

Yep!... Capcom, for obvious reasons!

And special thanks to Sega for putting their older games on VC!...

Ohyeah... EA, Konami and Rockstar are note-worthy:

EA (SSX: Blur, The Godfather: Blackhand edition... Both great games!).

Rockstar (Finally supporting a Nintendo-console, despite weak sales: Table tennis, Bully, Manhunt 2).

Konami (New Flight-game by Ace Combat devs, Dewy, Elebits...) 

Hudson has a ton of stuff. Hudson is #3 on VC (behind Nintendo and Sega). The company is famous for Bomberman and Mario Party. Hudson and Nintendo have had a close relationship since the mid-1980s.

Hudson is owned by Konami but self publishes. If their support combined was counted, Konami would be the 3rd party most supporting the Wii.

As for Wii, http://en.wikipedia.org/wiki/List_of_Hudson_Soft_games#Wii

1.) Capcom (Come on RE5!!!)
2.) SEGA (Mario & Sonic (?), VC & WiiWare games)
3.) Ubisoft

I don't think you guys should be counting PS2 ports and VC games as support for the wii. Or the shovelware that companies are putting on the wii. The only major games that i can remember going to the wii is Monster hunter 3 and thats due to the low cost of making games for the system, it has nothing to due with respect for the wii. RE4 port and a railgun game by capcom is not support, its called cash-ins.

If we toss out PS2 ports too, is there anything non-Nintendo left? 

Sega maybe for their VC support, but otherwise it's laughable.

Capcom is the only third party that is currently taking the Wii seriously, and only mildly at that.

EA is trying, but meh.

Ubisoft has tried, but gave up.

The rest never tried and will hopefully suffer the consequences.

well konami is taking wii serious just look what thyve´ done with pes 2008 /WE 2008 !

I would only say Rockstar was properly supporting the Wii if they made some sort of GTA for it.  The Wii version of Table Tennis was meh, and Manhunt was flawed.  Bully seems to be the only decent game they've made for Wii.

Last gen, if Sega came upin a topic like this, I would have laughed and said 'who cares?', but they really have shown some good efforts this gen (minus Sonic the Hedgehog 06).

OT: I'd say 1. Capcom, 2. Sega, 3. Ubisoft, 4. EA

Certainly it must be Capcom. Awesome 3rd party support from the company, imo. Love their games.