LOL - I had the same prob when I registered with 3D Buzz.
I tried Mario, but it was already taken, so I just attached the first letter of my family name (H) and here it is, boring as it gets:
And even though I always sign my posts with 'Mario' (without the .H) everybody calls me Mario.H (if ever...).
But now I use renderizer as my nick in every friggin forum.
"Stop calling me names, will ya?!"
Subdivide and conquer!
Free your mind, and your ass will follow!