it seems like there are videos popping up with android 2.1 running on our beloved Sprint Hero. I have seen several. The update must be around the corner. The supposed rumor is mid February. From what I have seen on other sites, the European Hero will receive the update on February 15th. Check out the link below if you haven't seen it already:
HTC Hero to Taste Android 2.1 in February - At least in Europe - Softpedia
With Sprint being the number 3 carrier, that should entitle them to receive some of these newer Android phones and/or updates sooner. Sprint has the best data plans for these phones with the Simply Everything plan. All of the other carriers are starting to follow them with their Unlimited pricing.
All that said, i wish they hurry up with the update.