That's where MoteDaemon, an awesome project out of Berlin, comes in. Ultimately, the plan is to integrate the tiny server application with the wiiflash.org library, but it updates have been spotty at best. To fill the gap in the interim, however, we have developed an as3 library based on Sebastian's javascript / as1/2 examples using the XMLSockets.

A very early version is available here and while we may not grow this library much beyond its current state -- hopefully we'll find a way to get into the wii flash library with a mac -- you may find it handy (or at least fun).