Ok, well we've been bickering amongst ourselves (me included), but failed to ask the OP some relevant questions...
1) what email system ARE you using? Exchange, Lotus Notes, Yahoo (gasp), etc...
2) Call quality - i actually did have some echo and call quality issues previously, but after I did the *228 trick, it cleared it up. I'm not sure if that was the actual fix or if I was just lucky or the planets aligned or whatever, but there IS a fix coming OTA. Maybe you can try the *228 trick?
3) This isn't really a question - The passion won't fix the email issue since it'll run on the same OS. It's not a HW problem, it's an OS problem.
EMAIL : For corp email, we have Lotus Notes. The net result is I have not found any push email solution. Im hoping for a Notes Traveler solution sometime soon.
Ive managed to sync contacts and calendar through Companionlink (to Google Calendar), but have noted some issues especially with calendar. Repeating notices dont seem to always work correctly, especially for notices that originated on an outlook system. CompanionLink has announced a wired solution, I think Ill actually be moving to that when it comes out as I think it takes the Google Calendar out of the mix.
I also have Gmail syncing, as well as a POP account. Works fine.
Call Quality : On my end, the sound quality has been exceptional, on the phone, on speaker, and on my Bluetooth headset. Ive had the Droid for almost two weeks now, and I learned yesterday that there was a significant echo on the other end... once I started asking people about it, I found that it was pretty pervasive (not always, but nearly so). I found a trick here that Ive validated which is to switch the call to the speaker, and back to the handset - I tested with several people today, and it always solved the problem. Not ideal, but until the OTA update comes its fine.
Battery : Ive read more here on this subject than I ever wanted to know. I use the power control widget, and generally keep everything off, and the screen brightness to the minimum most of the time - but turn on all of the above whenever I would be actively using them.
During the first week, I could not get a full day out of the battery. At all. No matter what I did.
Over the past several days, I have noted a SIGNIFICANT improvement in battery life. True, Ive not been browsing as MUCH (novelty has started to wear off). I read yesterday that while cycling the battery is NOT necessary for the droid, that a full cycle (deep discharge followed by full charge a couple of times) can help "calibrate" the sensor. I did that - cant say with full confidence that was the solution, but the timing at least lines up.
As a data point, the About phone app reports is been off the charger for 15 hours and 40 mins, and the battery is still at 40%. Ive had heavy call usage today, BT has been on MOST of the day, wifi probably at least 5 hours... GPS was on for a couple, sync was on all day. Display was lowest setting all day. I probably browsed about 1.5 hours, and on for games, apps etc otherwise for another 2. I would characterize that as MORE than acceptable battery performance. Overall, a good day for the Droid... YMMV.
jc