You might notice a few new menu items.
The forum is supposed to automatically detect if you are using a mobile device and give you an appropriate alternative to the full website.
Apparently this feature doesn't work all the time so there are links in the menu that allow you to choose your format. WAP2 is usually the best choice. None of the formats are fancy... but are easier to read.
Also in your profile you will notice the opportunity to add links to your facebook, twitter, Linked In, Pinterest etc etc.