Don't be enthusiast. After Maxim merging Dallas many things (data sheet, application notes, user guide) in microcontroller area has slow down a little bit.
They didn't succeed to overcome the 33Mhz border for 89C420 and still have problems with mass release at 50Mhz. And You are expected to see 80C400. Help god to keep their promises and all see some touchable at the end of this year.
Until then try DS80C390 for CAN applications and wait a while for ethernet support or try TINI platform at: http://www.ibutton.com/TINI/.
If you are impatience take a look at: http://www.ibutton.com/TINI/ds80c400.pdf

Silviu