Apple has released software that should make broadband connections a little faster, called 'Broadband Tuner'.
The 320K software raises the default sizes for TCP send and receive buffers. The software applies these changes across a system, with the exception of modem connections, where smaller buffer sizes are used.
Apple explains: "Broadband Tuner allows you to take full advantage of very high speed Internet connections that have a high latency (5Mbps or greater). The installer tweaks some system parameters.
"The installer increases the default values for the size of the TCP send and receive buffers. With larger buffers more data can be in transit at once. A startup configuration file is also updated so that these changes will persist across restarts."
An uninstaller which will restore the settings that were in effect at the time just before the system parameters were changed is also available.