What you had is actually really close to what I was thinking. I like the idea of talking about some technical thing I figured out, and group it with other ideas or interests (like your photo page, I liked the photos!).

I am currently protoyping the idea with my wedding page. I built a self hosted WordPress service, learning how to set it up and maintain it has been an interesting challenge.

And to me, I'd ask why does it matter if you don't know how to use gdb or $TOOLSET? A lot of learning has to start at some point, and for all you know what you figure out either helps someone new or it shows someone else a new way to use it.