I just started two crypto blogs as well, one modestly technical and one more hardcore. Their start pages are:
* security weblog
over which we occasionally post our findings on security topics. It is
moderately technical, and should be readable to anyone who has used
digital signing or similar cryptographic applications.
* crypto weblog
over which we occasionally post more technical topics. It and targets
people who have a course understanding of how algorithms for digital
signing and encryption work.