One way to find your own is to go to GOOGLE search engine.
Then use keywords like health webquest.
Art
Eyes on Art

Music

Drama

Creating Cartoons
Chinese
Six Paths to China
SOSE
The Big Wide World
SA Patchwork Project
Travel Buddies
Science
Murder Under the Microscope
Atmosphere Australia
CIESE Collaboration
Jason Project
Seasonal Changes
English
BookRap

Maths
Rollercoaster

Health
Foodquest

Phys Ed
Human Race

General
OzProjects
Tased Online

Links for Early Learning and Junior Primary
http://www.edna.edu.au/go/browse/0:schooled:resources:earlychild#resulttab

Judy Beal's website (JP)
http://www.teachers.ash.org.au/judybeal/

Matrix of Examples
http://edweb.sdsu.edu/webquest/matrix.html

http://www.sbcss.k12.ca.us/sbcss/specialeducation/ecthematic/index.html
http://www.first-school.ws/theme/alphabet.htm
http://www.geocities.com/Athens/Aegean/2221/
http://www.kconnect.com/
http://www.perpetualpreschool.com/
http://kindergartenclass.netfirms.com/
http://www.redshift.com/~bonajo/preschool_activities.htm
http://www.preschooleducation.com/
http://www.preschoolbystormie.com/
http://www.fastq.com/~jbpratt/education/links/preschooltoddler.html
http://www.preschoolrainbow.org/
 

OzLine.com - Web and Flow - WebQuests with Tom March
http://www.ozline.com/learning/index.htm

Aussie School House
   http://www.ash.org.au/projects/default.asp

Nasa
    http://quest.nasa.gov/calendar

Global SchoolNet Foundation
    www.globalschoolnet.org/cf

Discovery School
    http://school.discovery.com/teachers/index.html

EDNA
http://www.edna.edu.au/