Just an "old guy's trick" for increasing font size on forums (I actually employed it with the short lived move to the new format a day or so ago):
If you have a mouse with a scroll wheel, hold down the CTRL key and move the scroll wheel back towards you ... the text size will increase (works in both Firefox and IE 7; not sure about the others). You can also increase text size using the "View" -> "Text Size" menus, but the scroll wheel works easier for me.