last year I think I made about £300 all by myself so I think as a group you can do much better than that. I basically insisted that everyone at work sponsor me. I sent several emails to everyone and those that hadn't sponsored me the week before I hassled like crazy until they realised it was easier to give me money....
. I think putting a link on your facebook/bebo/myspace pages is a good idea. maybe you could also try getting some local press writing a story about you doing the walk....it all helps. I dont think anyone I know, didn't know I was doing the walk last year, I told anyone and everyone in the hope they might sponsor me....it worked.