Verizon Droid is a SERIES of phones HTC Droid Eris is next

1.

Droid is the brand name being applied to Verizon's Android devices. It isn't a single phone. 2. The Sholes -- the phone we've been calling the Droid so far -- may simply be known as the Droid. 3. HTC's Desire will be coming to market as the "Droid Eris."

Source:
http://www.engadget.com/2009/10/23/verizons-droid-is-a-series-not-just-a-phone-droid-eris-coming/