i used mactella version 1.1 with mac os 9.x for long time and until now this version is the best of all,that's why i would used mactella with mac os x,too.
but,the design isn't attractive and i don't use mactella for mac os x,because i don't connect to gnutella-host,mactella don't remember my preferences. 
my question for you: why do you develop mactella for mac os x than     cocoa-client,because each user could adjust your mactella client,the tool doesn't use much place and it will integrate perfect in mac os x? 
thank's for your answer 
RALPH 
mailto: 
sralph300@t-online.de