I've just discovered the Smashing Magazine Website. It is not about mapping, but more about graphic design although it does mention an exhibition in Sheffield called 'on the map'.
Just browsing through Smashing Mag is hugely inspirational. It has tutorials and links to tutorials - including this one on how to use the mesh fill tool in vector applications to draw a face, which I will be trying to apply to make decent mountains (I hope).
I apologise in advance to those of you who are going to spend a few hours of their lives lost in this website...