It's not a joke guys. Here's something I posted elsewhere; (The link is currently down though)
http://www.msnbc.msn.com/id/4641298/
"The announcement of the new "Gmail" service was first reported by the New York Times and quickly reported by CNET News.com and wire outlets as well. The timing and wording of Google's press release, however, immediately generated speculation on online forums that the news was an elaborate April Fool's prank by Google.
Google spokesman David Krane, reached Wednesday night, admitted that the "color and personality" of the press release -- which is dated "April 1 UTC" and includes phrases such as "millions of M&Ms later, Gmail was born" -- "was indeed in the spirit of April 1" but said that
Gmail was a serious product."
also.....
"Google will limit individual attachments to 10MB"