I've recently started trying out debian hurd (while simultaneously studying debian packaging and hurd translators). I'm running it in qemu.
My C is rusty. I was a unix sysadmin for 20 years, but have been retired for a few years, and primarily worked in perl for the last ten years of sysadmin work.
I want to contribute something to the hurd, so I've decided to do porting, since my C skills aren't enough up to speed for core development.
For practice, I've decided to work on clisp, since I'm familiar enough with it to test it and evaluate whether it's behaving. I also use it regularly on linux, so I want it available on my hurd installation.