Thanks to everybody who sent this in. AT&T has officially released OS 18.104.22.168 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 v22.214.171.124 (Multilanguage)
Package Version: 126.96.36.199
* Applications: 188.8.131.52
* Software Platform: 184.108.40.206
* File name: 8310M_PBr4.5.0_rel152_PL220.127.116.11_A18.104.22.168_AT&T.e xe
* File size: 89.91MB