Stacking bonuses - fewer types to keep track of?

[Driddle]

Seen any hints yet on whether the kinds of bonuses (armor, dodge, inherent, luck, etc.) will be simplified in 4E? It can be a pain now to try to keep track of which bonuses stack or have upper maxima.

 

[Chris_Nightwing]

I'd be happy with a very short list. At minimum I reckon bonuses can be split into Race, Class, Spell, Equipment, Circumstance. Feats should probably be unnamed.