I just signed up as an AttentionTrust member (check out my spiffy new graphic in the sidebar). I have been meaning to do this for some time since it became public. I started following it after meeting (or at least disagreeing with) Steve Gillmor back at the Dave Winer’s Geek Dinner for Scoble. I may disagree with him over the pending demise of Office, but he is doing truly interesting work on attention.
It will be very interesting to see how the big players (i.e., Microsoft, Google, Yahoo, etc.) deal with user-controlled attention. My guess is they will completely ignore it unless enough users demand it. Of course, if just one of them buys into it then maybe it will be adopted by everybody.
I am looking forward to (and willing to help, if necessary) the Internet Explorer version of the AttentionTrust Extension. I work in Internet Explorer pretty exclusively (it just doesn’t make sense to use Firefox when developing with Microsoft Visual Studio). Actually, for what it is worth, I use the tabbed Maxthon browser which makes use of the Internet Explorer engine.