Where is this spam coming from

Where is this spam coming from

Checked the source of this hostisp.info to look for my url and found the following code in it:

a href=http://www.globalwarmingawareness-2007.com/2007/01/25/winners-need-entries-in-both-google-msn-and-yahoo-with-globalwarming-awareness2007

Winners need entries in both Google/ MSN and Yahoo with

It seems to be a shady network of sites that uses content from rss feeds to keyword stuff .

What strikes me odd is the rel=nofollow, but maybe this is ignored because of the non-closing tag.