Well, I'm not much of a run/bike/swimmer these days, but from the 5k run WOD last week, I'd say CF is having a positive effect on my muscular endurance and aerobic capacity.
Everyone is posting their WOD's in threads below titled like "Crossfit Week #". You can see week 4 here: http://www.beginnertriathlete.com/discussion/forums/thread-view.asp?tid=49944&posts=12&start=1.