OCSDE, you’re on the right path. I like the fact that you are keeping your design simple and usable. Not too many banners & lots of good content. You’ve also done your social bookmarking homework.
If I may give one tip. On this page
http://www.onlinecasinospiegel.de/casino-aktionen.html
have the names link to the appropriate place. Keep up the good work and keep the content coming. Content & links, thats the name of the game.