Here are some upcoming events that should be of interest to the AWS community:
Eric Hammond (creator of a number of public EC2 Ubuntu and Debian AMIs) will teach an EC2 Beginners Workshop at Barcamp LA on the 25th and 26th of October (that's this weekend). Update: Eric has provided plenty of additional information on the workshop in the comments.
The final stops of the AWS Start-Up Tour will take place in London (November 4th), Amsterdam (November 6th) and Seattle (November 20th).
If you are running or are aware of any other events, let me know and I'll update this post (perhaps I will even use a real calendar at some point). Here are some updates:
The November 11th meeting of the New York City Cloud Computing Group will focus on Building, deploying, supporting high availability applications on EC2 and S3. AWS developer Kaavo will demo their IMOD (Infrastructure and Middleware on Demand) system on EC2.