Efforts are underway to harness the vast amount of information being generated about Hurricane Katrina. If you are hosting sites providing critical information, please tag according to your purpose so your site and posts can be identified — katrina and missing, safe, searching,  housing, survivor, food, jobs, volunteer, donate, collect, links, photos, reference, etc. If you see sites that aren’t using tags, please encourage it — not everyone knows what tags are or how to use them — and/or link to them with the appropiate tags via sites like del.icio.us , furl , MyWeb2.0 Some blogging software converts categories to tags.