Sadly this is not OS 5.0 but at least AT&T is trying to keep up with their latest release of OS 4.6 for the Bold. Joshua let us know about AT&T releasing OS 22.214.171.1244.
BlackBerry Handheld Software v126.96.36.1999 (Multilanguage)
Package Version: 188.8.131.529
* Applications: 184.108.40.2064
* Software Platform: 220.127.116.11
* File name: 9000M_PBr4.6.0_rel519_PL18.104.22.168_A22.214.171.1244_AT_amp_T.exe
* File size: 96.79MB