Here's a possible layout for the (Gryffindor) common room and the potential of our floo network; click on the first five icons (the quaffle leads to the stadium, the left bookshelf to the classrooms, the fireplace to Hogsmeade, the last bookshelf to the library, and the globe to the Lexicon):
An example of code integrating a link with a graphic is:
Prefects, feel free to copy and paste the code in your common rooms... minus the spaces, of course. :P After the forum's running smoothly; I'll tweak more icons (for the Hufflepuff, Ravenclaw, and Slytherin common rooms) and post them here.