Re: US based affiliate companies providing datafeeds
Take a look on the ABestWeb forum. You'll find many of the networks charge you for datafeeds so many US affiliates (don't ask me why cos I think it's rubbish) pay PopShops (preferable) or GoldenCan (yeuch) to get hold of every merchant going and because the affiliates use the services the merchants end up paying them too.
For some reason they're all mad about ShareaSale on there which is filled with loads of small/medium sized merchants. Buy.At is now active in the US and has a few nice clients there. CJ in the US is miles better than CJ in the UK but they charge for feeds, Linkshare is ok and for Canada, ShareResults.