Some great resources!

For reviews of almost every curriculum under the sun:
http://www.cathyduffyreviews.com/

If you are ordering curriculum from the US, here are a few great places:
http://www.rainbowresource.com/index.php
http://www.timberdoodle.com/
http://www.dhss.com/shop/

If you would like to avoid the hassle of shipping, check out this site for e-books:
http://www.currclick.com/
http://www.homeschoolbuyersco-op.org/ (lots of free resources in this homeschooling co-op)

Here are some cool math related sites.  Check them our for free math worksheets, lesson plans and other ideas.

http://www.multiplication.com/
http://home.avvanta.com/~math/  (a math enrichment program for grades 5-7)
http://www.cimt.plymouth.ac.uk/projects/mep/default.htm ( a mathmatics enhancement program)
http://www.ixl.com/math/ (math practice for all levels)
http://www.purplemath.com/ (site devoted to teaching algebra)


Here are a few more cool sites for you to check out:
http://www.khanacademy.org/  (Has links for thousands of videos covering every possible topic)
http://www.homeschoolinthewoods.com/ (Lots of history related resources, unit studies and great timeline resources)
http://www.starfall.com/ (For kids learning to read)
http://www.brainpop.com/ (animated educational site)

To learn more about different homeschooling philosophies:
http://www.homeschool-curriculum-for-life.com/Homeschool-Philosophy-Reviews.html (a very well written examination of the pros and cons of a number of homeschooling philosophies)
http://www.welltrainedmind.com/ (to learn about classical homeschooling)
http://www.lifelearningmagazine.com/index.html (for more about unschooling/self-directed learning)
http://www.charlottemasoneducation.com/ (an introduction to Charlotte Mason's theories on education)
http://www.whywaldorfworks.org/ (an introduction to Waldof education)


If you are interested in ordering a full curriculum from one company, check out the following sites:
http://www.movingbeyondthepage.com/purchase7to9.asp (a curriculum for gifted children)
https://www.oakmeadow.com/  (offers distance learning and curriculum packages)
http://www.sonlight.com/ (a Christian homeschooling perspective but it can be made secular with relative ease)
http://www.amblesideonline.org/New.shtml (for a Charlotte Mason theory homeschool)