there is also
www.bikeusa.com - which has some good gear...
www.supergo.com has a lot of specials but often times last years style - brand new though and it will work a charm
another awesome place to find stuff is on ebay.com - a lot of legitimate businesses trade through ebay.com - it means they don't have to have a shop front and also its real good cause the people often help out with getting stuff through customs
still the biggest downside to getting stuff from the USA is the cost of postage - i recently found an awesome set of forks in the US that were real cheap but the cost of getting em to australia made the total price more costly than just buying the forks in australia
i highly recommend the ebay.com shops - you can pick a shop cause they have usually sold 1000's of items through ebay
make sure when you search ebay though that you find items from sellers who are prepared to send stuff to aussie land - usual cost of freight depends on weight i have never paid more than USD$20