A bunch of SEO conferences are scheduled to occur between now and the end of the year.

What: SEO Roadshow
Where: London
When: September 18th at high noon
Price: 100% Free

What: WebmasterWorld's Search Conference #7
Where: Las Vegas
When: November 16th - 18th
Price: $399 until September 15th
Hotel Tip: Harrah's has a special around this time frame...where it costs less than $50 a day ;) http://www.harrahs.com/hot_deals/las_deals.html

What: Search Engine Strategies
Where: Chicago
When: December 13th - 16th
Price: $1,595 before November 30th, $1,695 afterward.
single day pass: $495 before November 30th, $595 afterward.
Expo only pass: Free in advance ($25 On-Site) ... in some of the past SES conferences Google has been known to give out $300 AdWords credit passes at SES. Not sure if they will this year, but there are usually a few fun things to pick up.

(there is also an SES in Stockholm October 27th -28th)