Well it seems sprint is hard at work to patch the exploit to regain root. They are pushing 2.27.651.6 OTA (over the air) update today. do not download or install untill it has been verified safe, it is beleived to be a patch to fix the root exploit.
This is just a friendly warning.
Pleased Do not get the RUU from either sprint or htc as this has been updated to the new version, if you do you will most likely lose root
Android info on rom
it is still listed as 2.27.651.5