Is this real? on every phone i have owned the battery decreased after 25 mins no matter what never mind using all the other services you mentioned.
So, you have push turned on? do you just have mobile me or exchange also?
My battery barely lasted 8 hrs on standby overnight with 0% usage from me. I had everything turned on but use exchange so I guess my phone was polling the server like crazy (even though I maybe had 2 emails).
I have a feeling it was running something in the background. Check your usage times.