yeah, if the number in the screenshot is correct, that's roughly 98MB. So assuming an average of 1Mbps, that'll take 13min to download OTA if my math is correct. Don't go nuts if you check tomorrow and it says update not found. It'll be pushed out to random groups of users at a time and may take a full week for everyone to get it.
As stated above, make sure you have a full charge or are plugged in. Turn wifi off and make sure you have a good signal, otherwise it could take a while. It may also be a good idea to confirm that your contacts are backed up to Google, Backup Assistant, or you can export contacts stored locally on the phone (go to contacts, hit the menu button and choose import/export, export to sd card). You can backup sms via various apps in the market such as SMS Backup & Restore. MyBackup Pro is a paid app but can also backup sms, mms, calls logs, etc. None of this is required but it's better to be safe than sorry. There's always a chance that existing data or settings on your device may conflict with the 2.1 update. With the changes made between 2.1 and 2.2, I'd suggest a factory reset prior to the update but you can always just use that as a last resort in the event that you run into problems.
