Sol at Wild About Math has been doing a couple of neat things to help build or support the math/math ed blogging community.
First, he offered to promote your website/math efforts through guest posts.
Now he's offering to help you connect with publishers to review books of interest to you. I've taken him up on it already... against his better judgment? Surely you will do better than I could. Drop him a line - his address is on the About page.