does anyone know a buff addon like buffalo which supports the buff grouping of the standard wow buff display? The functionality should cover all buffalo features plus the grouping of buffs.
Satrina Buff Frames and Buffology will both offer the ability to create multiple frames, and perhaps filter buffs you dont wish to see to another frame, though that is a bit of a clumsy fix in trying to replicate the Consolidate Buffs feature (the one you are describing). The frames as far as I know could be displayed on mouseover only.
PhanxBuffs seems to offer a skinning and customisation feature around the existing buffs display, though it does not state specifically if it supports the consolidation or not. Though being a less substantial modification than the previous two, it will be more likely to.