I've suggested Glenn on the site www.theliveline.com - which is basically a service similar to Say Now. The artists / celebs call in each day or whenever and leave voice updates on whatever they're up to, whatever they like really. They get their own number so fans can call in, leave them messages, subscribe etc.
I know Glenn is already AWESOME and pretty much second to none as far as embracing new technology to keep his fans updated goes, but if it is possibly something he might be into, apparently they're very interested in hearing from people like your good self who might wanna jump on board.
And if fans wanna vote for Glenn to be a part of it, check out: http://www.theliveline.com/RequestArtists.aspx
(And click on "G" up the top of the page)