See this article (http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2004/06/16/BUG6P76LR91.DTL&type=business); there was also a cyberattack that slowed several large sites yesterday, including Yahoo! So it may have been their upgrade, it may have been this other thing.
Either way, the increase in space is to compete with GMail, and whatthehell, 100MB free ain't to sneeze at.
From:
May have been a different reason
Either way, the increase in space is to compete with GMail, and whatthehell, 100MB free ain't to sneeze at.