There are many things that don't interest me at all as a blogger. I couldn't care less about the newest version of your product. I just don't. Unless you're Apple, in which case I care because I worship you. :-)
But for the PR people who want to find space on this blog, please send me case studies. I love hearing how customers are using software. The customer is always right, so even if I don't personally dream about your company/client every night, if a customer does, I want to know, and I'd like to cover it.
I cover many of Red Hat's customer wins and case studies because Red Hat PR is good about sending these along, and even better about having an RSS feed to which I subscribe that covers these. Please do the same. I'd love to hear about how companies are adopting open source.