I just posted two messages on the Sevilla and Granada group in CS to see if tere is anyone who would like to organise something there, and to see if there are any hitchhiking friendly hosts.

The posts are here:
http://www.couchsurfing.org/group_read.html?gid=2421&post=6328410
http://www.couchsurfing.org/group_read.html?gid=1256&post=6328389

I asked for people to reply in the thread also if they can host. Maybe something will come out of this, maybe not. We'll see :)