The ISP will only flip if you're transferring a ton of data. As for the dynamic IP ... just have your chat server upload it's IP address to a mySQL database on your website with some php.
Server
Miscellaneous Forums/General Discussion/ServerThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.