Amazon has the T-Mobile Pocket PC for $299:

This will have an impact on Treo sales if it persists.

One thing - it says phone book capacity is 250 entries. I assumed that the Pocket PC phone edition has the usual miniature Outlook Contacts with no limit on the number of entries. If not, the phone edition is going to be too limited.

Apparently it can't dial a number from your contacts straight out of the box, if Agenda Fusion (which adds that functionality) can be believed.