Shameless plug, but why not go the widget route? Widgetbox.com has channels that are used to link different blogs together, but that may not fit your niche requirement. People love to see relevant content, so extending your reach by creating a widget and allowing those that are interested in it to grab and spread your voice is by far the best way.

Look around for other energetic web users that think like you (you're just in a niche and not something completely unqiue, correct?) and network yourselves together. Also, driving traffic to each other increases SEO and overall awareness on the web with minimal effort.