OpenLayers 2.3 is out (since 21 February, in fact). For details, see the release notes. Christopher Schmidt told me that MetaCarta is bringing a community developer in for a vector sprint (previously). I'm eager to see the results. Pleiades has a milestone this spring which will produce a release of PleiadesOpenLayers compatible with OpenLayers 2.3 or 2.4. Currently, POL distributes a patched OL 2.1.
Update: more from Christopher Schmidt.