This Class of 2009 has 18 students. You can see profiles online at uwasap.org > go to students section. There are 16 second year students. I am not sure how many total people were admitted, but I can tell you no spots were left over for the later rounds (past April).
Taking the CFA beforehand is a plus to your application, but I would estimate only half have passed a CFA Level 1-3. If you have never taken the CFA, you register for the June 2009 exam. Many of our students get scholarships, discount rates from Schweser, and a CFA Review class is given specifically for ASAP students. The pass rate last year was 100% for ASAP students. The UW ASAP Program is also a CFA Program Partner. This means that at least 70% of the material in the CFA examinations is included in our curriculum. As a side note, the CEO of the CFA Institute, Jeff Diermeier is a UW ASAP Alum.
Jobs placement is mostly buyside money management firms. We did have a few people intern on the sell-side last year at Credit Suisse and UBS. You can check out placement on the website as well. It is quite good, especially considering the competitiveness of placement within Investment Management.
Let me know if you have any other questions. I hope this helps.