Just bumping to say that Baen updated their Free Library as of 5 March.
I also like their sale site, Webscriptions. The following month's hardcovers are released in ebook about a week early for $6. If you want to pay extra, they have a subscription service ($15/month) that gives you 1/2, 3/4, or final parts of 5 books a month, all before they hit the shelves.