Meredith Barnes works as an associate agent at Lowenstein Associates. She's interested in both non-fiction and fiction, and has a particular affinity for "blog-to-book" projects. Barnes also handles digital strategy and subsidiary rights.
Barnes blogs at La Vie en Prose. I browsed through her archives to share a sampling of her posts.
On self-publishing: Barnes discusses when to self-publish (and what to try first), the stigma of self-publishing, how many copies of your book you should try to sell in order to make an impression on publishers, and patience in the query process before you decide to self-publish.
On Online Author Marketing: Marketing when you don't even have an agent yet, what authors need to do, how to work on your platform once you're agented,
On marketing in general: the importance of the book cover (you might also be interested in yesterday's post on covers), all about literary agencies with their own publishing divisions, and an excellent post on packaging and positioning your book.
There are lots more Agent Friday posts here.