I've already applied 6 patches from JIRA today, and I'm still hunting for more to do.
Here's the list of issues I've already hit:
MNG-3134
MNG-3046
MNG-3047
MNG-3062
MNG-3064
MPH-25
Yeah, I know... it's but a drop in the bucket. But it's all progress.
UPDATE: I added another 6 issues to the pile of patches applied. Most notable among these (at least for me) is a fix so that you no longer have to call Artifact.isSnapshot() in order to figure out that an artifact with version "1.0-20070812.111111-2" has a base-version of "1.0-SNAPSHOT".
Others include:
MNG-2961
MDEPLOY-56
MECLIPSE-281
MJAR-75
MSITE-243
MNG-2188