I also saw a comment on this website saying that the current batch of batteries may be faulty so the phone may have better battery life generally.
My sister's phone, Samsung ZV30, is 3G and the battery often lasts about 1 day on a full charge. It can sometimes last for a week but it depends. I think that if you have a 3G phone to constantly look for the best quality available 3G signal, then the battery doesn't last long.
If this is the case, you could turn the 3G on only when you wanted to use the 3G features. If you want to use the 3G features all the time then you may be out of luck for having a long lasting battery charge.
I personally don't mind charging the phone every night. Having a desk charger where you can dock the phone (do these exist?) would make this easier as you can just slot your phone in at the end of the day.
I am waiting to see what 'NZtechfreak' says about his overall dealings with Expansys before I buy mine, but, if the price comes down at Parrellel Imported to be cheaper than Expansys then I will buy it from there.