I need to find a new web hosting provider and/or shopping cart service that allows my online store to accept payments in Canadian funds. If I change my web hosting company as well as my shopping cart provider will my page rank start from the beginning? Thanks! :)

My family has an online commerce site and when we switched from Microsoft BCentral as our host to another company out of Georgia out page ranks plummeted! We were in the top 5 on Google and Yahoo and it took about 2 weeks to optimize the new site and get our rankings back. We did not change anything drastically on the page, just some of the text and the look (color scheme, layout) of the site. We got a shopping cart that was much easier to use and had lots of other features like coupon codes and wish lists. And from my understanding the small changes we made actually helped us gain higher rankings after the initial switch over. Hope this helps! :)

Generally no , unless you change your domain , URL's , or unless there's significant site , content changes. All of search engine ranking is based on URL's if that change(s) you start from scratch.