Can I use multiple Android devices with a single Google account?
I have a Motorola Droid running CM6 (Android 2.2, effectively) and a G1 running CM5 (Android 2.1, effectively).  The Droid is on Verizon and the G1 is on a pre-pay SIM card with no data (so it is basically a wifi device I use for dev testing).

I use the same Google account on both.  It does not force me to have the same apps on both phones.  I can download apps I have paid for on both phones without any problems.  Contacts, gmail, etc. sync just fine.

However, I do believe that if both devices are running Froyo, it will try to initially restore your apps when you add your Google account.  But I believe you can then uninstall them (it won't try to re-install again).