So far so good (fingers crossed). Using Kernel Power 49 and things are still better now than they were on stock kernel in the early days.
From a full charge this morning, I've made 4 calls (all about 5 - 10 mins in length); watched a few vids in CuteTube and browsed the web over 3G for 30 mins today. Still reading 60%+ in BatteryGraph.

I am actually considering purchasing a new/better battery over the next month or two, just in case.