kruptein make a post in Customer Service explaining what happened and give the domain name and username you tried to signup with and I'll escalate it to djbob.
Normal ftp'ing wouldn't cause the system to go down. The administrator keeps a watchful eye on who's abusing the system and usually suspends thier account so if your site is still up then your ok.
We were temporally down this morning which caused the Queued page to come up when you tried to access your site. The reason was probably abuse of resources.