The IP addresses are displayed in the log files for every request to your webserver. These files are located in the /home/username/logs/domain.com/http/ subdirectory.
If you want to move an domain that currently exisits on DreamHost to a new account on DreamHost, you will not be able to do so if you try to move it to an account that has used a promo code to obtain a discount.
If no promo code discount is used to create your new account, you should have no problem moving your domain (have your "broker" delete the domain so that yo can re-add it).
--rlparker