Hi David,
Yes, the bottleneck is testing, or at least the results of it. There are a few problems with one or two pretty important packages and it was felt a 4.6 release that contained those would be counter-productive.
The good news is that plenty of work is going into getting them fixed, so hopefully we're not far off beta.
When that beta is ready, we will put up another installation at hub.org and ask previous testers (and anyone else) to use these to assess the beta for us, confirm bugs are fixed and then move to a release.
I recall someone offered Oracle space a while ago for dotLRN. But (once again) I appear to forgotten who :o) (good weed though ;o)
Anyway, we coul really use an Oracle installation, like the hub ones, to test the beta on. Any offers please let either Me, Stan Kaufmann or Ben Koot know (or all of us), and we'll get to setting it up.