Recently bought a Transformer.
Recently joined up here.
Couldn't believe there is no support to allow us to connect to an adhoc WiFi network [love to know the reasons / business drivers]
If you want it so you can connect to most phones for Internet access when you're out and about, the following WORKS and it's easy to follow. Ignore 'xoom' reference
xda-developers - View Single Post - Got Ad-hoc wifi working on my Xoom! (binaries inside)
You will need the wpa supplicant file out of this:
Note: you need to start and stop WiFi service when you change connections.