Wow. I didn't realize I'd find a challenge I liked so quickly.  I found this one here, and here's my list:

1. A book with a color in its title: FOREVER IN BLUE-Ann Brashares
2. A book with an animal in its title: A COMPANY OF SWANS- Eva Ibbotson*
3. A book with a first name in its title: AUTOBIOGRAPHY OF ALICE B. TOKLAS- Gertrude Stein
4. A book with a place in its title: BIG SUR- Jack Kerouac
5. A book with a weather event in its title: KISSING SNOWFLAKES- Abby Sher,* THE SUN ALSO RISES, Ernest Hemingway
6. A book with a plant in its title: FLOWERS IN THE ATTIC- V.C. Andrews

I've got all of 2008 to complete these.  The Stein, Kerouac, and Hemingway ones I have to read for school anyway, so I'm sure those will get done, and the other three are young adult or romance (or both!), so those shouldn't be hard either. 

*I got a little overeager.  I couldn't wait to read these two, so I'm going to have to pick new ones for the challenge.  As of right now, I'm still undecided about the animal one.