To those having trouble with the NAS200 username and password, my experience and discussion with Linksys support may be helpful. 1. Resetting the password using the reset button works, BUT the username is now admin as well as the password. This is different to previous Linksys devices that I've used. 2. It appears to be necessary to use Internet Explorer (or an IE tab in Firefox.) Good luck.
Maybe so, but the manual tells you to leave the username blank. I can't go back to that state, but I seem to remember that a blank username was OK out of the box. But I might be misremembering from how my Linksys routers worked. Either way, the manual is wrong.