Here is an excerpt from a previous post in a similar thread. Although now I am running the PR1.3 and the v46 kernel. All other details are the same more of less and I am giving you today's usage.
My setup:

Overclock 500-1000 on ULV. on V40 Kernel. (now v46)
GSM only when not using internet or when accessing internet via wifi.
Battery Indexing Disabled using Tracker-cfg.
Battery is original that I have had since early march.
(I now have swappolube setting loaded also)

Today's use was around 25 sms and 30 minutes calling. Some photos using fcamera, about 80 minutes of Angry Birds. Some internet browsing approx 1 hour (wifi) and the updating of weather and email over wifi or 3G once every hour or so. Around an hour of listening to music. Some Jabber text chat via skype and facebook maybe for 40 minutes over 3G.

Full charge when I left the house at 0730 and I currently have 79% remaining.

Now that is not bad at all. That usage will get me about three days or so before I have to recharge.