The Email Standards Project, backed by CampaignMonitor and other email-marketers, is trying to use Twitter to convince Microsoft to change how Outlook renders HTML.

Outlook's broken - Let's fix it
http://fixoutlook.org/ 

"It's not about you. It's mostly about the designers and developers having to cobble together hack included versions of already standards compliant collateral." - an email marketer to a user who said the solution was to not use HTML email.

That's right, FixOutlook.org is not about fixing areas where Outlook is broken (and there are many) - its solely about making it easier for email marketers to design email so that it has all the bells and whistles found on web pages and works perfectly in all email clients.

Focusing on the end-user experience is more important. I want Microsoft to fix what's really broken so end users, not email marketers, can be more productive. To that end, I set up a forum where everyone can share what they'd really like to see fixed in Outlook 2010.

http://forums.slipstick.com/forumdisplay.php?f=34

The Power of Word in Outlook - Outlook Team blog
http://blogs.msdn.com/outlook/archive/2009/06/24/the-power-of-word-in-outlook.aspx