Ok. You aren't going deep enough into the site. And this is indeed a 'primitive' site I was referring to earlier.
When you open the House Sitting stuff it opens to jobs ALREADY ASSIGNED to you. Go to "Claim Projects" tab at the top of that page and it will open a page that looks almost as bleak. Go to the September 2010 and select the October 2010 from the drop down. Give the site a bit to load and you will see lots of pages of shops. Now go to Country on the left and select State, then go to the right and select your state. Once it loads you will have shops in your state and can look through the pages.
If there are too many pages of your state, then go back to where you selected 'State' and select City. Now go to the right and go down the alphabetical list of cities where shops are available and select yours or a town near yours.
Towards the end of October, when you go to the site and select November 2010 it will tell you that no shops are available until they post November work. They seem to post it all at once.