Just a perspective, and not to belittle the great work that has been done to provide these other functions but...
The majority of people are here and using the forums. I personally have no interest in the other parts of Railpage. So why channel and deliberately confuse those who use your
site? Certainly seems like a good way of getting your "fan"base off side by failing to cater to what they want to get from your site. The end result could be that they migrate to other places as an extreme.
A simply button that just says "forums" would be great. However, it's your site do what you like. I just hope that you don't see this as an attack, but rather an expression of an alternative point of view.