Some tech writers speculate this might be a practical joke or it could also be a legitimate campaign.  If this becomes a legitimate attack, all MySpace users should track developments carefully during April 2007. 

Up next: Month of MySpace bugs
http://blogs.zdnet.com/security/?p=127

QUOTE: The month-of-bugs phenomenon is showing no signs of slowing down. Next up: MySpace. During the month of April, hackers plan to expose security vulnerabilities in the popular social networking portal. The idea behind the planned Month of MySpace Bugs, according to the organizers, is to publish "silly XSS/misleading CSS style bugs" that affect MySpace user pages.

Kim Komando: Prepare now for MySpace bugs
http://www.komando.com/tips/index.aspx?id=3097

QUOTE: How secure is MySpace? It appears as if we are about to find out! The "month of bugs" trend continues with the recently announced MOMBY (Month of MySpace Bugs, Yuss!). Scheduled for April, MOMBY follows similar projects such as the Month of Apple Bugs.

MOMBY: a place for bugs (Official Tracking Site)
http://momby.livejournal.com/

QUOTE: The purpose of the exercise is not so much to expose Myspace as a hive of spam and villainy (since everyone knows that already), but to highlight the monoculture-style danger of extremely popular websites populated by users of various levels of sophistication. We could have just as easily gone after Google or Yahoo or MSN or ZDNet or whatever.

Month of MySpace Bugs: April Fools?
http://news.com.com/2061-10789_3-6168655.html

QUOTE: It appears that the effort is meant mostly to poke fun at the previous "Month of" campaigns that focused on browser, Apple and kernel bugs. "Months of Bugs are whiny, attention-seeking ploys for acceptance," "Mondo Armando" and "Mustaschio" wrote. Oh, when is the MySpace campaign starting? "Were you not paying attention? April 1, 2007