Chris, you can email Yvonne directly if you click on the letter symbol under her name (on the left side of the page). Similarly, Yvonne can email you directly.
If you haven't already done so, I'd recommend posting your family tree on our pedigree forum. There are already a lot of pedigrees posted there, and you may find a researcher who shares some common ancestry (or a researcher may find you).http://www.wfnforum.net/index.php?topic=2548.0
All the pedigree are sorted and organized onto the official family website at:http://www.worldfamilies.net/surnames/b/bergman/pats.html
Also, here is a direct link if you want to go ahead and order a DNA test:http://www.familytreedna.com/surname_join.aspx?code=M81357&special=True
And, if you want more information, there is a lot at the WorldFamilies.net website. I recommend starting at our Frequently Asked Questions page:http://www.worldfamilies.net/faqs.html