Forum Moderators: open
In my experience, the ISPs also have all sorts of cool widgets & doohickeys you can embed into your site to collect registrations, track behavior and send future targeted mails to, etc. Less stuff for you to build & worry about maintaining.
[edited by: caveman at 12:26 am (utc) on Mar. 8, 2007]
[edit reason] Removed specifics, per TOS [/edit]