1. Fixed (no scroll) background picture would look much nicer with the gradient
2. Light gray lines between the articles would differentiate them better
3. The search box can go in the page layout. Above it destroys the clean look of the page.
4. At the bottom below the download box is a huge gap which can be 30 pixel less
5. The Google map can be adjusted to the layout width
6. The round shaped tennis club picture looks ugly. Better use a rectangular one.
The rest is pretty good and running smooyhly... Good work
Nice job! I have a suggestion regarding your photo section. You have really nice photos, however, moving through them is a bit ackward. Maybe using RokSlideshow would improve that and add more excitement to the page.