hay your link is not working properly for me...
The link not working is part of a bigger issue discussed in http://forums.genvibe.com/phpBB3/viewtopic.php?f=27&t=38873
This thread is over 8 years old.
There was a contest for genvibe T-shirt design, a winner was selected, and T-shirts were available, using an on-line genvibe store.
One thread about them was http://forums.genvibe.com/phpBB3/viewtopic.php?f=11&t=6292
T-shirts went away for a while but in 2009 they came back
At various times over the last 8 years, some forum software changes took the store off line, and then eliminated it altogether.
Also, I think that the official T-shirts that made from this contest were pretty much sold out now.
There is an unofficial new Official T-Shirt
I have also seen genvibe T-shirts for sale at http://www.zazzle.com.au/genvibe+tshirts
These look like one of the designs from forums.genvibe.com/phpBB3/viewtopic.php?f=46&t=38165
but at $22.50 ea, I think I'll pass on those.