I thought about doing that, but I’m not sure it’s worth the effort, especially since my site isn’t ranked very well in Google anyway.  The vast majority of our hits come from Adwords, and I will definitely be changing those to reflect Magento’s URL’s.  I may just do some basic .htaccess rules so the old URL’s go to the home page or a landing page.

I made a lot of mistakes when I first started using osCommerce, so I don’t want to carry those over into Magento.  Call me crazy, but I won’t be using Magento’s osCommerce import feature at all.  I don’t like how my products and categories are structured, so I’m just going to start fresh.  I have all the raw data for my products in an excel file anyway, so I’ll be using that in some fashion to get the products into Magento.