Sun One with iplanet.
I'm not familiar with iPlanet, but if it can allow basic authentication and
connect to AD, it should be possible to do what you want.
Personally, I would rather that the browser did not automatically log me in.
For example, if someone was having problems with their "view" on the intranet
web site, if they visited your office, you would have to log off, let them log
on (and wait while their profile was created) just to let them open a browser.
Is it really asking too much for them to enter their username/password into a
browser prompt once each day? Heck, most browsers will remember usernames and
passwords so you don't have to type it. You just click OK.
That's just my perspective.
M!ke