I don't know if there's a Mac version but I use CyberLink PowerDirector and even Windows Live Movie Maker.
PowerDirector has an audio editing feature which lets you reduce wind noise by up to 10dB.
I'll look into Power/Director. The laptop I'm using now is running Windows 7.
Now if only i could figure out what is making the knocking noise when in video mode. I did drop y s100 twice. Hope I didn't knock something "video related" loose. Though, as I said, the first 2 test clips were taken after the drops. No knocking sounds (faint).
Could it have anything to do with the amount of light in a room? The clips with the knocking noise were taken in conditions with less light. Maybe something, while in the video mode, is trying to do some calculations? Shrug. Could it be the camera trying to AF? In which case shooting in M should eliminate the damn knocking sounds...will test tomorrow.
Don't think this is happening with DSLR's with HD video (e.g. 7D/5D2...etc.). The faint knocking sounds i mean.