Here is a notification utility smartWatchM for Sony Ericsoon BT watch (MBW-150). It supports all main features of Sony Ericsson phones and it even has some extra functions.
It’s developed for Smartphones/Windows Mobile Standard but works on all WM 5/6 devices (with MS BT stack).
AEP-Emu (DE/EN)
DMG Page (DE)
Indie Retro News (EN)
Retroguru (EN)