Okay, I just tested the mini to vaio throughput via adhoc network. Regardless of the range, it transmits at approximately 17Mbps. A lot faster than the 7Mbps I'm seeing otherwise. It still doesn't seem all that fast, though. Can one of you comment on the speeds you're seeing on your 802.11g network? I'm using "nc -vv -l -p 25001 > NUL" on the Windows side and "time nc -vv -w 1 vaio 25001 < /path/to/bigfile" on the Mac end. (You have to subtract one from the resultant time because nc's waiting one second for a response.)

There's a Windows timing utility in the free Windows Server 2003 Resource Kit Tools, which also work on XP. And here's a Windows version of nc.