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I've not known this ability to be present in SEOmoz, but I have had experience with other tools and suites and one tool that would be able to do this and check historic rankings is Searchmetrics http://www.searchmetrics.com/en/.

If you are a paying subscriber to Semrush? If you are Semrush has a backlink checker. But I would use Google custom queries to view your SERPs without scrolling through all the pages.

Hi Tim, That's awfully nice of you to say. Thank you! And yes, Localeze is a big help in the right situation. Good suggestion! Take care, Miriam

This is a solid SEO strategy as long as the content is unique. Ways you can additionally add value is by making sure you are changing product names and titles;url descriptions; product image titles; meta tag descriptions; etc....... Some of your competitors might see it as an attempt to generate more results for the same business...because of this you should be aware of some of the giveaways of this strategy. Here is a post from a  fellow seomoz'r that gives some examples: (see link below) http://www.seomoz.org/ugc/uncover-competitors-using-multiple-sites-for-multiple-first-page-rankings Here are 4 different sites and look at the image description: dead giveaway they are related. http://www.samplesite1.com/heels/assets/ProdStandard/J09.JPG http://www.samplesite2.com/heels/assets/ProdStandard/J09.JPG http://www.samplesite3.com/heels/assets/ProdStandard/J09.JPG http://www.samplesite4.com/heels/assets/ProdStandard/J09.JPG here are 4 different sites and look at the url description. dead giveaway they are related. http://www.samplesite1.com/contacts/lens-406.asp http://www.samplesite2.com/contact-lenses/lens406.asp http://www.samplesite3.com/lenses/lens-id406.asp http://www.samplesite4.com/contacts/product406.asp MAKE SURE YOU CONTINUE TO FOCUS ON DIFFERENTIATING AS MUCH AS YOU CAN. Make it happen.

Yes! You'll want to go to Open Site Explorer and type in their domain and you can move lots of switches and levers there to see all kinds of data. http://www.seomoz.org/blog/one-giant-leap-for-link-data-announcing-open-site-explorer is an introduction from when OSE was first launched and can give you an idea of some of the neat things you can do.