While we're talking about group displays of solidarity which may or may not work (like Snowflake '07), along comes Bum Rush The Charts. The idea is apparently that on March 22, 2007, everyone goes to iTunes and buys "Mine Again", by the group Black Lab. The idea behind this is apparently to show the record labels how much peope hate their anti-podcasting tactics (suing podcasts for copyright infringement, for example). Black Lab is an independent, podcast-safe band that twice left record labels due to issues with them. Seeing them at the top of the iTunes charts, if even for one day, will show the record labels that the podcasting community is a force to be reckoned live.
Or at least that's the idea, I guess. The cynic in me thinks someone in the band came up with the idea as a way to make a bunch of money.
If you decide to do this, you can buy the song via an iTunes affiliate page they've set up at http://www.financialaidpodcast.com/bumrush/ . All affiliate income from sales on this website will apparently be turned into a college scholarship.