The last couple times ive added music (I just unhooked it because i couldnt wait any longer) to my phone and now that im downloading the 2.2 upgrade it backs my phone up ridiculously slow! It's been 30 minutes and its barely 1/4 of the way down! WTF?
The backup process time from Firmware 1.xx to 2.xx has been substantial. Some members have mentioned 8 hour backups or longer.
There is a way to make the backup faster and it has worked for quite a few people.
Plug your iPhone in and under the devices tab in iTunes, click on it. Uncheck the "Automatically Sync iPhone". Then unplug and replug the iPhone into your computer. Now when you plug it back in, right click on the iPhone under Devices and a drop-down menu should appear, select "Reset Warnings" and push Sync.
This is the critical point. You will now see a popup asking if you would like to allow iTunes to send information to Apple, select DO NOT ALLOW.
If it's doing a long backup every time you connect the phone, something's not right. It will take a long time to do a full backup, but subsequent syncs should be incremental backups and go much faster (minute or two as opposed to an hour or more).
I would go into iTunes settings and delete any backups you have of your iPhone and let it sync and make a fresh full backup. See if that speeds it up for subsequent syncs.
If you want to do something like this and not necessarily do a backup, hit the X and it will skip the backup. Just make sure you do it before the backup starts. If it has started and you hit the X,IMO you are asking for trouble. This is one cause of corrupt backup files.
I really don't know to be honest. Don't know if I said OK to that or not, but my backups rarely take more than 2-3 minutes. Closer to 2. Once in a great while it will take 15-20 min. Not sure why though.