Well, if you pre-order a print copy, you can get the PDF now. Of course, that requires spending $45 (+ another $6.75 shipping, if you can't get an FLGS to pre-order it for you).I like what I've seen of 13th Age...but all I've seen is a very early draft.
If I can find something more usable/up to date, I'd consider this.
http://www.pelgranepress.com/?tag=13th-age-2