If you opted for a Motorola Backflip because (a) it's the only AT&T-subsidized Android device available at the moment, or (b) you liked the form factor, you should be prepared for a longer wait for Android 2.1. According to Motorola's timeline, Backflip users can expect to see the update in the third quarter of this year. Given that we're already well into April, the third quarter isn't too far away.
As a recap, the DROID has received the update, the CLIQ and CLIQ XT are expected to receive it in the second quarter, and the Devour is currently "under evaluation." Backflip users, can you make it to the third quarter, or will you be looking for a new device (running Android 2.1 out of the box)?