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A container tag which iterates over a list of all of the weblogs in the system. You can use any of the weblog tags (MTBlogName, MTBlogURL, etc — anything starting with MTBlog) inside of this tag set.
blog_ids - This attribute allows you to limit the set of blogs iterated over by MTBlogs. Multiple blogs are specified in a comma-delimited fashion. For example <MTBlogs blog_ids="1,12,19,37,112"> would iterate over only the blogs with IDs 1, 12, 19, 37 and 112. This feature is available only in Movable Type Enterprise.