San Jose Public Library: The eBook collection

Digital Libraries: Surfing around looking at the most obscure series of links, I discovered that The San Jose Public Library has an ebook collection. Apparently, you can check out ebooks (via digital download) and “borrow” them for 21 days, though, in truth, they remain on your computer.
(Now of course I realize that lots of libraries have digital collections and that one of my favorite sites, The Internet Archive, has tons of digital material, but the idea this big public library chain in the heart of Silicon Valley has a digital collection is, well, appealing.)