Well, I just (as of about ten minutes ago) converted Freezer Burn from a phpweblog 0.5.0 site to a GeekLog 1.3.1 site. I'm really pleased as GeekLog gives me more of the features I was looking for and it's much easier to customize (although I am looking for a way to include something in the footer template that will only show up on the index page only (some webring stuff). Any ideas?
At any rate, I wrote a phpweblog to geeklog converter script and you can download it from here (just rename it to .php, edit it, and off you go).