Robitronic also make a multi-phase charger.
Their first version was a 3-phase thing, but packs was too cool... So now they have 4 phases, and 4. is a custumable one, which basically is an overcharge phase with the purpose of getting the temp up.
Robitronic recommends phase 1 = 8-9 amps, phase 2 = 5-6 amps and phase 3 = 3-4 amps. Phase 4 is selectable and adjustable, where you can specify some minutes of extra charge, including the rate, I think.
You can read more here:
http://www.robitronic.com/produkte/expert_e.htm and also download the manual here:
www.robitronic.com , where the 4. phase is explained.