Looks like there will be new Cisco routers available soon. It was only a matter of time given the release of the 888, 860, 861 etc, especially given that an ADSL router wasn’t released at the same time.
Release notes here:
http://www.cisco.com/en/US/docs/ios/12_4/12_4x/12_4_15xz/rn_SR520xz.html

Entries (RSS)
July 19th, 2008 at 5:16 pm
picked up some more info from cisco.com.
Cisco Secure Router 500 Series:
Cisco SR520-FE-K9, Cisco SR520W-FE-K9, Cisco SR520-ADSL-K9, Cisco SR520W-ADSL-K9, Cisco SR520-ADSLI-K9, Cisco SR520W-ADSLI-K9
July 20th, 2008 at 6:51 pm
Just waiting for stock and pricing now. Need an ADSL router and these look like just the job