I am scraping the front page of froogle.google.com, scraping overture for each keyword, if the top 5 add up to a certain amount I scrape those, save it all to a database and find the ones with a reasonable amount of searches, see what the bids look like for those and start making sites. it works well if you have a tough time pulling random niches out of your ass + I get a premade keyword list for those niches I do. I was scraping 7search keyword tool before but it makes you re-enter the captcha too much so I moved to overture...