The Samsung Galaxy Exhibit II is a mid range Galaxy line phone on available on T-Mobile. Power users who own this new handset can finally get their toes wet in the ROM flashing pond with the first two available custom ROMs for the device. Both ROMs are brought to you by XDA Senior Member jocala.
The first ROM, Peach Sunrise, is a customized version of the stock Gingerbread build. Free versions of Titanium Backup, Voltage Control, CIFSManager & Quickboot are included. The Samsung WallpaperChooser application has been unlocked and wireless ADB access is possible. If an enhanced ROM based on the original TouchWiz-laden release feel sounds good to you, this may be the build you want. Necessary files and flashing instructions can be found in the ROM thread.
The second ROM is an unofficial build of CyanogenMod 9, and brings ICS to the device. While the build is definitely stable enough to run, camera bugs and Bluetooth issues may prevent many users from picking this up as a daily driver. Jocala promises no ETA on additional features, but mentions that the ROM is a work in progress. For instructions, necessary files, and progress updates on the ROM, be sure to check the ROM thread.
As always, be sure to backup your entire device before attempting to flash anything. For updates and discussions on the Exhibit II, jocala has put together a helpful resource thread, so head there now and check it out!