does your data backup contain a a lot of app in it.?if yes i think some of the app in the data you backup making ur battery drain fast,

how about to restore again to 2.1 and quickpwn again, then see how it work, if batter not draining so fast means that when you transfer back all your backup data into you iphone, some of the app drain you battery fast..

yes, delete all the app would be nice since we can only use default app after restoring,and we can assume that app you restore is the problem that make ur phone battery drain fast, and if im not wrong, we can only restore back some file for example your contact, calendar, note etc, try not to back up your app because 2.1 is different from older firmware,

  i suspecting that the app you backup is not for firmware 2.1, thats why it make ur battery drain fast, may i know what firmware you using before you upgrading to 2.1..? please dont tell me its 1.1.4..huhuhuhu..  because some of the app, they have update it to make the app compatible with new firmware so if we use older app into the new firware, maybe..maybe..it make the battery drain fast or some any other error in iphone...cheers...
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i don't think the quickpwn not the culprit because other people not getting this problem including me, yes you can restore it back but i think  it will waste your time deleting, restoring, upgrading to new firmware,quickpwn it, then restore it back, pain ooo if doing like that,
BUT...by doing like that, you will get more experience and will eventually know what cause you iphone battery draining fast.
p/s:  sorry error typo, 3G phone does not come with 1.1.4 or older firmware, SORRY...

i am already on 2.1 and thought of using quickpwn 2.1 to re do it.
I got another issue as well.When i check in boss prefs my file size on / is only 80 mb out of 500mb and in itunes my others is 300+mb. I used quickpwn for my friend as well and never used backup to restore and set his phone up as new phone.He has got the same 80 mb of space left but i just did his but cant check his battery performance yet

Please advice how to get back this loss of space.I suspect this is draining the battery so i think he will have the same battery issue as mine but i am just assuming

Restored to 2.1
Quickpwned 2.1
Set up as a new phone(Painfull and tired)

Analyzing battery power now...Will post update

Cheers

sorry a bit off topic, I manage to upgrade to 2.1 JB. Everything works ok but somehow I feel that its a tad slower than 1.1.4.

Now I need to find a SMS app that enables me to forward SMS in 2.1. WeiSMS doesn't currently support 2.1. Apps in the default repos for cydia and installer 4 doesnt list any SMS apps. Would very much prefer a free/sponsored app. Thanks in advance.