Please use the tag "northernvoice" for your flickr, del.icio.us, Technorati, jots, etc. tags for blog posts, podcasts, photos, etc. pertaining to the conference.
The posting also has some other ideas about how to manage conference blogging.
Anyway the tag is "northernvoice". (Personally I would have choisen northernvoice2005, although with better systems you could do tags like northernvoice+2005 or maybe even conference+northernvoice+2005.)