[projectileboy]

You can do cool stuff with unhygienic macros, however, like anaphoric macros. Interested readers should check out On Lisp by Paul Graham, as well as Let Over Lambda by Doug Hoyte.

[jon6]

You can still do anaphoric macros with hygienic macros.

http://blog.racket-lang.org/2008/02/dirty-looking-hygiene.ht...

<edit> And http://blog.racket-lang.org/2011/04/writing-syntax-case-macr...

[brudgers]

[Most of] Let Over Lambda as free HTML: http://letoverlambda.com/textmode.cl/guest/toc

Graham's On Lisp as free PDF: http://lib.store.yahoo.net/lib/paulgraham/onlisp.pdf