It appears as though Droid Eris users are finally receiving an over-the-air Android 2.1 update and it is verified by several users. As you may already know, that HTC CEO said that HTC Sense UI and Android 2.1 is coming to all “Hero” devices and I think Verizon is the first one to get the update . Verizon also announced that the Droid Eris will get the 2.1 update in the early Q1. Looks like that time has come.
In the following video you can see that Sense UI is working fine on the Droid Eris: