I've changed it to the top 600, and excluded etags (NY-05, AK-Sen, etc), so it'll easily go down to fewer than 100 diaries. The link is now incorrect, of course. It's now:

common tags sorted by frequency | alphabetically

The other items take a bit more coordination, but are good suggestions. As a first step, I should probably provide a tag search page under meta.dkosopedia.com...