Web 2 practitioner

Now officially a Web 2 practitioner, what next? I guess that's the question re- blogs in libraries, what's our purpose? Clearly it's a communication tool, but what's our objective? How will our library patrons benefit from a library staff blog? Or is it a staff collaboration tool?

Already some answers to this in inventive blogs thus far - as a serials network tool for said collaboration, as a wish list generator for great fiction titles, and I guess the possibilities are endless...