If waiting until July for the real Android 2.2 update is intolerable for you, then try a hacked build of FroYo for the Motorola Droid. Hey, the Nexus One has the finalized FRF85B build, so why should the highest resolution Android phone in the land be missing out on the fun?

The 60Mb FRF84B ROM can be installed on rooted Droids in the following manner:

1) Download the files
2) Place files on the root of your SD
3) Go into your Recovery
4) Clockwork Directions: go to install zip, find the zip on your sd card, and install
SPrecovery Directions: go to install zip, select allow update.zips (deprecated), install update.zip
5) Reboot
your phone.

Source: My Droid World.