TIM Italy has already posted 184.108.40.206 release for Blackberry Curve 8900, but in case you need it, here is the information on release from Rogers.
Software For BlackBerry® Curve (TM) 8900 smartphone
BlackBerry Handheld Software v220.127.116.118 (Multilanguage)
Package Version: 18.104.22.1688
* Applications: 22.214.171.124
* Software Platform: 126.96.36.199
* File name: 8900M_PBr4.6.1_rel378_PL188.8.131.52_A184.108.40.206_Rogers_Wireless_Inc.exe
* File size: 123.35MB
NOTE: Don’t forget to delete the vendor.xml file located in c:program files>common files>research in motion>apploader to install it on a different carriers device.