I'm in the process of nosing around a number of web2.0/social networking sites at the moment, and consequently people that know me may receive various "friend" requests to interrupt their otherwise pleasant day. Acknowledge these if you have time, but no worry if you don't fell like it.
I've even set up a mice pace account. It turns out that you really can set John Cage's 4'33 as your favourite song (no word on whether the Mike Batt effort is also available). Of course, I've set mine up not to autoplay when people come to the page -- don't want to irritate anyone with my choice of audio.