If you use a Palm and a Mac, you need this. Just trust me. We were aware of it, but it wasn’t until we installed it that we realized it now comes with a new Notes conduit and a simple Mac Notes application as well. (The Calendar, Tasks, and Contacts data all map pretty well to the native Mac tools that come with OS X, but up to now there was no simple Notes equivalent; this addition is a huge boon.)
Oh yeah: we bought one of these because we STILL can’t find the old Zire 72 we planned on using in our post-Treo world. Of course, said Zire will doubtless surface nearly immediately, or perhaps after it’s no longer feasible to return the TX.