As much as I'm looking forward to 4E, Sword and Fist was a painful lesson. I'll let the early adopters sift out the wheat from the chaffe in the books before I touch them.
I'm also going to wait until the first round is complete before buying. It was kind of crappy that some players had to wait longer than others before expanded options were even available. It was completely understandable from a publishing perspective ... but at the table, it made for an unbalanced experience for awhile. Lesson learned.