Titus,

Thank you for reply. Actually, I do use your session module from the
wiki :) I even have plans to integrate SQLObject in it.
Interesting solutions, both have their advantages, have to think..
But I am afraid at this point I don't understand the technical part of
cross-site authentication: how the other site knows who I am? I mean,
I log in on site 1. Cookie is created.... I am welcome... now here is
a link that leads to another site. Probably, the link must contain
that unique (session?)ID, so the other site will automatically
identify me? Otherway, how can it know?

--
Ksenia