Where is a good place to get up to the minute info on affiliate and SEO conferences?
I maintain a list of upcoming affiliate marketing related conferences on the homepage of AffiliateManager.net. Among those conferences, I am co-founder of the Affiliate Summit conference, and you can opt-in from the Affiliate Summit homepage to get the weekly newsletter and find out about all future events.
As far as search engine conferences, I would suggest checking out Search Engine Strategies and Webmaster World.
And coming this October 6-8 is eComXpo, which is focused on both affiliate and search engine marketing. eComXpo takes place exclusively online and features the top names in online marketing, plus lots of unique networking opportunities.