They may not be "old" for all I know, but Patrick Logan and Bill Clementson have been hacking with Lisp for a long time. A lot of their weblog content has been great recently, if you're into programming language design and implementation. Also, they have a lot of knowledge on non-obvious mechanisms for Web programming.
Clementson conveniently packaged up his 2004 best blog postings. As an example, check out his thorough discussion of programming Web applications with continuations.
Logan has been fighting the good fight, making sure folks know there are a lot of good ideas in those obscure dynamic languages.