Verizon just announced the update to 2.2 for the Droid, now they are updating the Devour. It's not 2.1 though. They are adding some goodies and making enhancements. Software version CALAND_X_01.15.10 will provide enhancements and improvements to voice-mail, V Cast video on-demand, and 3G coverage. It will also have City Id preloaded to tell the city/state on the caller id.
55.5 % of phones are on 2.1, while 22% are on 1.6, and 1.5 has a large 34.1%. I don't know what is taking the phone manufacturers so long to update these phones, but it is frustrating for many users.