If you are just starting out with Wonder, the simplest path to usage is probably to download the binaries and install the frameworks. Mike Schrag and the good folks at mDimension Technology provide a binary download that is automatically updated daily from the latest Wonder source. So freshness is guaranteed.
You can get the latest binaries here:
What Should I Download?
As you can see from this image, there are a number of different downloads. The 53 and 54 suffixes in this screenshot refer to binaries compiled for WebObjects 5.3.X and WebObjects 5.4.X compatibility respectively.