Pay the W.E.P. tax to get Entourage
Microsoft is already two companies according to Derrick Story, a writer for the O'Reilly Network... one that produces boring apps, and one that produces exciting ones, but only for the Macintosh.
Derrick loves Entourage... I'd buy it in a second if I could get it unbundled from Office but it's too expensive as a suite and I don't need or want Word, Excel or PowerPoint anyway.