Google is beginning to run tagged words as ads - tads= tag+ads. Clicking on them takes you to a page of ads based on that word. 37 Signals blog has a short entry , comments and a link to this in action. One can imagine these tags being put into content itself which is sort of scary. (via kottke -- who does seem to be doing an awful lot of pointing out "neat" things in the larger papers. Not sure what I expect for my small contribution but not sure it is links to articles I've read it will be interesting tosee how his "experiment" evolves over the year.)