One of the things which concerns me is whether the new PIM will "play nice" or at least "play" with Outlook. I've never used the software which came with my Palms & Clies & it would be unfortunate if I were given no choice. Or the choice to NOT use the special PIM features if I wanted to continue with Outlook.
I'm also concerned with how it will interface (if at all) with Datebk5 (issue brought up in another thread) but I can live without Datebk5 (albeit kicking & screaming) but not Outlook.
For what its worth, the specs indicate that the TH 55 contains versions 4.5x of Datebook, Todo,Memo, and address. I think this bodes well for outlook compatibility.