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
just download the attached file, extract it using winzip/winrarCode:http://www.filesonic.com/file/2989205455/DooMLoRD_v1_ROOT-zergRush-busybox-su.zip
go to the folder where its extracted and execute "RUNME.bat"
read and follow the instructions on the screen!