1. Only one name change is allowed per calendar year. (2011, 2012, and so on) Once a new year starts you have another name change you may use. One letter changes or a simple capitalization of your name is a freebie and doesn't count as your once per year name change.
2. You must have 250 posts, have been a member for 2 months, and have a 0% warning level in order to have your name changed.
3. You must leave your previous user name in your signature or user title for 4 weeks where people can clearly see it. This is to allow people to get used to your new name and recognize you. It would be a good idea to do this before having your username changed. (Put "formerly known as *old name here*" or similar)
4. If you have a trade rep thread, you will need to link to it so it can be renamed with your new username. If I forget to change the name of your rep thread after I change your name please let me or another mod know so traders can find you! Also, if you are playing in a tournament on the forums, please post in the respected thread (or pm the tournament host) to prevent confusion that might occur.