So it looks like Lucene 2.9 has all of a sudden accelerated the release, and it seems at this point wiser to release Solr 1.4 with Lucene 2.9 (non-dev), assuming that goes quickly as planned. Feels like we're a bit behind schedule here in Solr-land anyway, so it really doesn't seem like it would slow our release up much.
-Yonik http://www.lucidimagination.com