Looks like Indosat released an official OS for the Flip users. This is the same as the OS that was leaked a while back, but still install at your own risk!
BlackBerry Handheld Software v22.214.171.1241 (EastAsia)
Package Version: 126.96.36.1991
Software Platform: 188.8.131.52
File name: 8220EastAsia_PBr4.6.0_rel471_PL184.108.40.206_A220.127.116.118 _Indosat.exe
File size: 85.5MB