InfoWeek announces that "Google Debuts E-mail Security Services For Business. The software bundle includes Google Message Filtering, Google Message Security, and Google Message Discovery".
"Google's new security and compliance offerings -- Google Message Filtering, Google Message Security, and Google Message Discovery -- will be made available to users of Google Apps and to users of other e-mail systems, including Lotus Notes, Microsoft Exchange, and Novell's Groupwise."
In another article on InfoWeek, about Microsoft buying Yahoo, the question of Zimbra comes up. Zimbra is the open-source email and collaboration platform that Yahoo bought last year. The article says, "Zimbra mail poses too much of a challenge to Exchange to stay alive if Microsoft succeeds in acquiring Yahoo."
Microsoft knows that there is big money in email (Think Exchange, OCS, Hotmail, and a host of Microsoft VARs), but so does Google (Apps), Yahoo (Y! mail and Zimbra), Everyone.net, and many ISP's.
Sonic.Net just rolled out IMAP to replace POP email. There are companies doing email to voicemail, so travelers can listen to their email. There's plenty of money left in email.