One of the resources we often use when promoting blogs and RSS feeds is directory submissions. There are many kinds of directories to submit blogs to. There are blog-specific directories like Technorati and Best of the Web blog directory. There are also RSS specific directories and search engines. Google blog search is a RSS search engine, but you cannot submit the blog directly. You can however, ping Google blog search, but pinging is only relevant for RSS feeds.
Besides blog and RSS specific search engines and directories can also submit blogs to regular directories that have categories for blogs, such as Yahoo.