I have been experimenting with Hotdog. Now for anyone thinking this might be a new designer drug, my apologies, you'll just have to check out Hotdog's blog.
We've been working on an experiment to reduce the amount of screen real estate our blogs take up - well to be honest, Hotdog's blog takes up ;-)
We've come up with the Eddie and Hotdog BlogBlock. The buttons can be used to hide/reveal large quantities of code ...