I'm not sure if this interests anyone other than librarians, but the Queens Library now lets you request books using just your barcode, which I find much quicker than having to enter a barcode followed by a password.
The downside is if anyone ever learns my barcode they can request books on my behalf. That could be fun, too, though. It would almost be like a book club.
Here are a bunch of Queens Public Library links: http://www.lagcc.cuny.edu/library/lib_othrlink.htm.
I hope CUNY+, LaGuardia's catalog, allows this as an option one day. There's something about entering a password that makes something as simple as requesting a book feel a little chore-like.