> Bo teraz to mamy list rzeczy kt re chcesz, a kt re picassa bodaj spe nia,
> wi c jest to nieco podejrzane ;]

http://google.about.com/od/googlereviews/fr/picasawe
brev.htm

Sharing Photos

Picasa Web Albums allows two levels of security. You can either make
an album public, or you can make an album unlisted. If the album is
public, everyone can see it, and if it is unlisted, you can still see
the album if you know the album's secret Web address. You can click on
the Share this album button to send the URL of either private or
public albums.

This is not actually a secure way to make pictures private. Other
comparable photo services, such as Flickr, offer password protected
albums and sharing with select friends. It is really a pity Google
doesn't do the same for Web Albums, since you can do this with other
Google products. At the very least, there should be a way to share
photos with only registered users.

Nie ma opcji folder na hasło :)

Pozdrawiam
Radek