The all important functions of Personal Information Manager (PIM) that everyone expects are the standard PIM functions such contacts, calendar, tasks, etc.

Sketch Book provides a way to write and organize notes.

Time Tracker could track check-in and check-out time.

Familiar distribution along with GPE or Opie (or even a full blown Linux environment) provides a very good foundation to build a open mobile Linux platform upon which businesses and individuals could take advantages of. Given that most of the vendors exited the standalone handheld or PDA market, applications such as phone (yeah phone, both GSM and CDMA), GPS, and so on are sorely needed. There are individual efforts to port this platform to other phones, such as Palm Treo, HTC device-based Pocket PC phones but none is stable enough for day to day use yet.