Arnoud,
It's been an incredibly busy month for PlayScript...
The framework has been in heavy flux lately, due to our (Zynga's) internal development efforts. I'll upload a new snapshot of the binaries, but just want to let you know that there is so much dev work being done in the core libraries and the compiler that the binaries will be out of date the moment they are uploaded. It might be a good idea for you to actually get a dev build going, and actually rebuild on a fairly frequent bases (particularly when you see large numbers of bugs or issues resolved in the issues list).
Also, just an FYI.. most of the work has been concentrated around improved conformance for AS3, and expanding the support in the class libraries for game related classes, in addition to a great deal of work being done in optimizing dynamic support, and optimzing commonly used classes like Dictionary, Vector, Array, and ByteArray. We now have multiple projects running on mobile - the earliest now at a solid 60fps, and even though these projects tend to require a bit of patching of AS3 code to be compatible with the (growing) subset of AS3 that PlayScript supports, we are pretty pleased so far with the results so far