Good news for Cliq, Cliq XT and Backflip users -- Motorola has set up mailing lists for you to stay abreast of the news about your Eclair (Android 2.1) update.  Again, Moto is using the phrase 'when the 2.1 arrives' and not if.  You'll need to be a member of the official Motorola forums (see source link for details), and you can sign up here:

Cliq update news ; Cliq XT update news ; Backflip update news

No dates are given (of course) and I'll stress again that we have no idea when you'll get your update.  Head over and get signed up! [Motorola Owners' Forum] Thanks Jahntassa!