Tablet wars - which one to buy?

The HP WebOS tablet announcement yesterday adds another tablet option.  It won't be available until this summer, though.  And the iPad 2 announcement is eminent.  Confused about the best option?  Seems that there are as many opinions as there are people writing about it.  Here are a few things to look at. HP's announcement.

Engadget hardware comparison.

Robert Scoble's thoughts. 

GeneralDavid Cantontablet