No they already announced no more work on that.
Not that it matters, 4g uses sooooo much battery on the Evos it's not funny. You won't want to use it except in very rare instances. On the Evo 4g, you can almost watch the battery drop when you use it.
On the other hand, it's a fantastic phone.
Many will go, and we will get a LOT more people on Virgin, but, it's not exactly like the OV has no roms.
Also, remember, while many say they will right away, this phone will be around $300, it will take many a while to get the money for it.