I use Sublime Text 2 in Ubuntu. The program downloads and runs on it's own without an installer (sort of like a portable app, I guess). When I pin it to the launcher, it only stays until I restart the computer. Then I have to dig it up again and repin it. This wasn't an issue in 11.04.
If you add Sublime Text 2 using the PPA,
Open the AWN settings
Go to the "Task Manager" and drag&drop Sublime Text from your menu to the list.