Version 0.2.0 of OpenWIG has crude support for Bluetooth GPS modules. Plus a Play Anywhere mode, so you can play the included Zooventure Level Two regardless of where you live.
In other news: misch of geocaching.cz said that the gwc format doesn't look at all difficult to him. And that he would probably be able to decode it.
That means that OpenWIG will probably have support for original Wherigo Player cartridges, and that means that you will be able to play full-featured Wherigo on your mobile phone!
Isn't that just wonderful?