WiiRd is in some form of development.. and well, several crashes are known but unfortunately really hard to fix as they often have their cause in the USB Gecko drivers which are sometimes very hard to have control on. The features.. currently none really, a watch list perhaps!
A watch list would be nice... for the record though, I've decided my tunneler project doesn't need a watch list built into the code handler; I've found ways around the major overhead of peeking several different addresses. Adding it to the PC app would be very nice though. And if you think there's a market for adding it to the code handler, by all means feel free to do that. Although now my project kind of wants as many lines of code as possible... so if you think adding something to the code handler would be good, it would be awesome if you found some way of making that feature optional (e.g. having a "normal" and a "debug" code handler).
Sorry if I'm rambling, just don't feel any pressure from me for a code-handler-implemented watch list. At least for now, anyway.
