Search Engine Land's SMX Advance comes to Seattle June 3rd and 4th.While access and networking passes are already SOLD OUT, Developer Day and Expo passes are still available.
Search Marketing Expo has added a variety of networking options, some of which can be found here.
Keynotes include Kevin Johnson, President of the Platform and Services division at Microsoft as well as Google's renowned spam fighter Matt Cutts.
For those interested in tuning in to some advanced search engine marketing techniques, there should be numerous live bloggers at the event.
If you're in the Seattle area on Tuesday or Wednesday, even expo passes usually provide a good networking opportunity (not to mention a bag full of schwag!)