PR2 is not PR0, so you aren’t as bad off as link swapper said you were.
But to raise your PR you need more links from good quality sites.
Your meta tags say something about no cache which is not a good idea for a site like yours. The cache being shown (the content you are being ranked on) is from March:
http://66.102.7.104/search?sourceid=navclient&ie=UTF-8&q=cache:http%3A%2F%2Fwww.cyberspace-casino.com%2F
Why your traffic dropped could be for any number of reasons. If you don’t know where the people were coming from, you need to get a statistics program.