Thread navigation improvments like that are on the list to be fixed. We are looking at making quite a few changes to the forums so this may or may not be added to the current fourms - it maybe get deffered to a more wide ranging overhaul of the forums.
You can do this:
Go to page one of the thread.
You will see a URL like:http://www.eham.net/forums/Elmers/214917?page=1
change the '1' to the page that you want to fast forward to - like page 5 in your URL bar and hit enter.
The URL will look like:http://www.eham.net/forums/Elmers/214917?page=5
Thanks for the suggestion.