Thanks to everybody who sent this in. AT&T has officially released OS 188.8.131.52 for the 8310. I guess they are slowly telling 8300 & 8800 users that they won’t be upgrading their devices. This is after they upgraded the 8320 & 8820 to 4.5 recently.
BlackBerry Handheld Software v184.108.40.206 (Multilanguage)
Package Version: 220.127.116.11
* Applications: 18.104.22.168
* Software Platform: 22.214.171.124
* File name: 8310M_PBr4.5.0_rel152_PL126.96.36.199_A188.8.131.52_AT&T.e xe
* File size: 89.91MB