Though I believe this to be a MyPhone bug and not a ROM as I've seen it in many different ROMs. When using an old MyPhone version, the app asks you to update OTA before syncing. You will then reboot, and select the type of data you wish to sync. It will then hang trying to authorize and will likely timeout or hang.
A work around if this happens, as it is not every time, is to just install the most recent MyPhone (1.5.2410) w/o using the ROM provided version, unless it is the latest version. Here is the .cab for the new one if anybody needs it.
Also, here is the direct
LINK to Microsoft's website for MyPhone that should kick off the download for the latest .cab for TP2 (Touchscreen). It will show you the current version before downloading.