I see that Don, Adam, and Kent got submissions accepted at PASS in September.  I too have a session accepted that will be on SQL Server Express 2005 (which I will also be presenting at DevTeach in June).  I was happy to get my acceptance because last year I did not have a technical session accepted.  The Program Committee works hard to get the best content for the audience. 

If you sign-up to go now, the cost is $1295 I believe.  If you go to one of the SQL Server Road Shows going on over the next several weeks - Today in SF, May 12 in Chicago, May 17 in Houston, May 19 in Dallas, you get a $100 off of that rate.  The Road show is $99 - so in essence is free for those who continue on to PASS. 

I will be at the PASS Europe Conference in 2 weeks.  Can't wait to get to Munich!  I am speaking on Table and Index Partitioning.  There is also a really good pre-con by Kimberly Tripp on 2005.