I did the tag editor:
The "Guess Tags" button in the composer uses the "Magic words" defined for each tag to give you a starting set, which you can edit later. Still has a few implementation issues (thus the taglessness of this post) but it's almost there.
Using HTMLTidy I made all the HTML validate (as transitional, at least).
Using browsercam I made sure this page works on every decent browser (it looks bad on IE 4.0, and Netscape 6):
Added a feedBox widget that can display as a sidebar any feed that uses FeedBurner's BuzzBoost (see "Latest comments" on the sidebar).
I am now toying with using FeedBurner's API to (optionally) automatically publish all the RSS feeds BartleBlog generates there, thus making this kind of thing more transparent.