But surely every weekend should be a retro challenge?

Just kidding. I'll give it some thought but don't think I can commit to any projects this winter. Between work, family and CHESS rehersals/performaces there are not many hours left in the day.
Actually, I just finished a retrochallenge of a sort. Moving from ECHO to DISQUS for the comments on my blog (now called Projects and Articles) and collections webpages. I shifted the comments manually by cut and paste, which was indeed a mission. If I was a competent programmer and knew about APIs etc. apparently there was a way to automate the process but it would have taken me longer to learn the programming than to just do it!
So it's now done.
Let's hope Disqus don't discontinue the service. That's always a risk in these fast-changing times.