What i'm basically looking to do is to add a price comparison into the product info page i.e. a cost for the same product on other sites. I can put this manually into the HTML description but would rather it was all in the DB and pulled out per product.

I'm really looking for an idea as to where to start more than anything else. Is this something I could just write into the template files or are there other files I should put in place seeing that this will be pulling additional content from the DB?

Thanks for any advice in advance,
Arthur