Niisan switched names to Imitation-Animation 
quite a while ago.  Amy and company have had 
their doors closed since before November last 
year, I believe.  There has been no news whether 
or not they will ever be back in business, 
although I really, really, really hope they'll 
be back sometime!  Still, I think it's a good 
sign that even though the site is no longer up 
and running, they still own the rights to the 
domain name.  So keep your fingers crossed, all 
those of you who loved their work, and let's 
hope they'll be back!!!! 

As for other artists out there, I don't really 
know.  I'm leaning further and further into CG 
art commissions (mainly for my story)... so my 
need for cel artists isn't as great any more.  
=P  Good luck finding something, though.