Acces times of drives linked to the USB port of an Airport Express station
aren't very good in general, even in WLAN n-standard.
But it's working ok in Leopard as I can reach up to 12 MB/s with my Macbook Pro 17".
Average speed is about 4 MB/s.

It's also possible to use that shared WLAN-drive with XP on Fusion to f.e. copy files in Explorer
even it's slower again.

But what does not work at all in Fusion (nor in Parallels) is when applications
within Fusion XP want to read or write on that drive !

It's somehow blocked.
Little Snitch firewall shows blocked connections, still blocked after manually allow
the services. Even after Little Snitch was uninstalled, those ports and services
seem to be blocked.
F.e. Microstation CAD reads its configuration from a shared drive when starting.
But when I plug the drive from my host to the Airport Express, Microstation
hangs minutes while starting until it starts with the local default config.

Why can't applications in XP on Fusion access these drives on an Airport Express?
Although they can acces shared drives of the host or other computers, little slower but
without any problems.

Thanks,

Micha

Mac Pro 8 core 1st gen., ATI 3870, 12 GB, VMWare Fusion 2.0.4, OS X 10.5.7 , XP Pro SP3,