[rbanffy]

It says exactly that. It's written in Guile (which is inconsequential until it reaches the second part) and can take Scheme code as configuration file (which is very interesting).

[s3m4j]

I read that, but to the end user, that's not really a plus if the "old" syntax works the same.

How does mcron's working differ from cron's ? That's what should be on the front page, not the language its written in.