I have a mac mini 1.25ghz with 510mb memory. My ADSL provider is Wanadoo/KPN (3000 kb/s download speed claim). With Limewire I manage a total download speed of maximum 350 kb/s with individual files downloading at max. 40kb/s. I find this all rather slow compared to the (theoretical) 3000kb/s promised by the provider. Am I expecting too much or is there a bottleneck I don't know about? According to your little test I don't have a blocking firewall.
Thanks
auba