Just a minor note, on some browsers (notably NetScape, and quite possibly (although untested) Gecko based browsers (Galeon/Mozilla/etc)) "non-session" cookies are stored in memory UNTIL the browser is shut down, at which time they will be written to disk.
This is only important to think about when you are testing cookie dumping (and/or contents of cookies) and haven't had the precense of mind to close the browser in between sessions.

Just something to think about,
JP,
-- Alexander Widdlemouse undid his bellybutton and his bum dropped off --