Fogie, the guitars with the "wavy" frets are Frank Gambales signature Yamaha AES FG model which feature a new system called "fretwave". The idea behind it is to compensate for the inacuracies in the standard tuning/fretting system. This inacuracy is most noticable when playing a "third", for example,when you tune your guitar and play an E chord the "third"(Gsharp) is O.K. untill you play an A chord and it sounds slightly sharp. The same happens with the G and C chords and, although the difference is slight, you can find yourself going slightly mad constantly re-tuning depending on what key you're playing in. The "wave" in the first fret(behind the G string) and the second fret(behind the B string) makes you tune those strings slightly flatter which makes the whole instrument more in tune whatever chord you're playing. It was devised by a couple of Australian rock players who used a lot of E and A keys and it apparently has attracted the attention of a number of other guitar makers so we may get to see a lot more wavy frets around. Hope that doesn't raise more questions than it answered fogie, C-flat.