It's very simple. There are two methods.
Method 1 (preferred): Go to the forum at Misfitopia. Make a post saying something like, "Hi, I'd like to enter my (blog, site, forum, whatever) in the Thunderdome." Do NOT put a link in your post. Put your link in your member profile (either in your profile URL or sig). We'll let you know when your contest begins.
Method 2: Send an email. (You will, however, receive a faster reply if you use the forum instead.)
Uh, didn't you used to have a submission form here?
Yes. Unfortunately, the submission form wasn't very good at filtering out spam, so we've taken it down.
Although we will make a reasonable effort to provide a high standard of quality for our services, we make no guarantees of any kind regarding the dependability, accuracy, or timeliness of the services.
The administrators reserve the right to add, reject or remove any site from this contest without notice, without compensation and at their sole discretion. Furthermore, the addition, rejection or removal of a site from this contest does not necessarily reflect the opinion or beliefs of the administrators. Moreover, the administrators are not responsible for the content of the sites in this contest.
You agree to defend, indemnify and hold Blog Thunderdome, its judges and its sponsors (MaximumAwesome.com) harmless from and against any and all claims, losses, liability costs and expenses (including but not limited to attorneys' fees) arising from your violation of this Agreement or any third-party's rights, including but not limited to infringement of any copyright, violation of any proprietary right and invasion of any privacy rights. This obligation will survive any termination of this Agreement.