I bought this battery a couple weeks ago and it pretty much crushes the stock battery. It costs more than the one on amazon but its great. Quick shipping too.
With heavy consistent use (i.e browsing and texting while playing angry birds for an hour) it gets hot but other than that, doesnt get hot while charging and tethering it stays cool too. I have chads incredikernel, I bump charged this morning, been putting light medium use on it, music browsing texting and phone calls and I've been tethering for a bit as well. Been on battery for 12 and a half hours and sitting at 44%.