Matt & Morgan will be staying at the Shafer Baillie Bed & Breakfast. We would love if we were to manage to rent out all the rooms there with our friends and family. So, if there are still some available, feel free to join us. There are a number of suites with multiple rooms, so you can coordinate with other people to share them.
http://sbmansion.com/

There are numerous other hotels in the area, though, which can suit a variety of budgets.

http://www.collegeinnseattle.com/ -- From 65/night
http://www.baconmansion.com/ -- From 119/night (It has BACON in the name!)
http://www.travelodgeseattleuniversity.com/ -- From 127/night
http://www.hoteldeca.com/ -- From 159/night
http://www.universityinnseattle.com/ -- From 189/night