Here are some hot resources I’m hearing about, to check out:

On marketing:
Seth Godin’s blog
Made to Stick
www.successful-blog.com

On writing good headlines for posts:
copyblogger.com
problogger.net

On finding speaking venues:
Confabb
Speakernetnews.com newsletter
BlogHer has a speakers wiki

Technical tools:
(The entire presentation for the tech tools session today, complete with links, is here)
Google custom search engine (see here for example of how this works)
alexa.com (to check for broken links)
websiteoptimization.com (to check and improve the speed of your site)
searchengineland.com (to research your keywords and phrases for search engine optimization)

On streamlining blogging workflow:
(The enitre presentation for the workflow session today is here)