Rotten Tomatoes have published their Mid-Year Report, which features a list of the best and worst reviewed movies of the first six months of 2007. You can see the top ten of each below.

Best Reviewed Movies
1. “Ratatouille”
2. “Away From Her”
3. “Once”
4. “Knocked Up”
5. “Hot Fuzz”
6. “Sicko”
7. “The Host”
8. “Zodiac”
9. “Waitress”
10. “The Lookout”

Worst Reviewed [...]