Ive noticed a few people building hubs using Thumblogger. IMO those are giving links to someones AFF ref code.
I'm toying around with a Wordpress MU. So I'm going to build my own
using my own links.
Also I post about my freesites and link the post to a mirrored main page. That main page has links back to my hub and one of those annoying pop up dating IM things. They are slowly bringing in traffic and a few signups. Nothing big so far but its a start.