Was talking to a member in an earlier thread about rooting the Gingerbread update and he had the Sony Xperia just found the root exploit here it is
Root Download This zip
Download Links:
Links are hidden from guests. Please register to be able to view these links. just download the attached file, extract it using winzip/winrar

go to the folder where its extracted and execute "RUNME.bat"

read and follow the instructions on the screen!