The latest draft of the URI Template spec is available:
As usual you can find the HTML, diffs from the previous version, and an updated URI Template explainer web service here:
I folded in much of the feedback on the 02 draft. Here are the notes from the revision history:
Added more examples. Introduced error conditions and defined their handling. Changed listjoin to list. Changed -append to -suffix, and allowed -prefix and -suffix to accept list variables. Clarified the handling of unicode.
As usual feedback is welcome on the W3C URI mailing list: