While Tweetscanning for 'Microsoft interview', I ran across the most detailed blog post I've ever read about the Microsoft interview experience:  My Microsoft Interview Experience, by Ben Watson.  If you're wondering what it's really like to interview at Microsoft - from application all the way to an offer  ... and pretty much down to the minute :) - Ben's got the answers.  He also provides lots of helpful links and tips, without giving away the farm.

If his trip report is too long for you (yes, it is over 4500 words! :), Ben also provides a helpful summary

• I wanted this job bad so I killed myself studying.
• Microsoft takes good care of you.
• Food.
• Golly gee, they’re nice people. Smart too!
• The interview lasted 9.5 hours and was both difficult and fun.
• I got an offer. I accepted.

And Top 10 things to do in my first week at Microsoft:

1. Wear my Google t-shirt.
2. Set my homepage to www.google.com
3. Continually ask, “Have you met BillG? Where’s BillG? When can I see BillG?” 

....

And Top 10 reasons why I'm excited to work at Microsoft:

1. The opportunity to work with people smarter than me. The chance to meet some of the people I admire in the software community.
2. The projects and technology under development always inspire me. Almost every event I’ve gone to has had me come away wanting to look into some other cool technology and thinking of the ways it can change the world.
3. A real career path as a software engineer.

....

Ben, congrats on your job with Microsoft, and we look forward to seeing you here in person!  Oh, and I think you've definitely earned your very own I am the empire tee.

Gretchen