I was working on the speed issue for the last few days, as soon as Petty4life indicated there is a problem.
There was a number of settings we had to adjust, but the site should be way faster, and more responsive now.
I also installed an antispam product. It will not eliminate all of the spam, but should decrease the volume. It relies on a central database shared between different forums. If a spammer is banned somewhere else, he will be denied registration at our forum. I will monitor how it works in the next few days, and adjust the settings if necessary.
Thank you all for reporting the problems!