"Note: Over-the-air Notes syncing is not supported on iPhone 3G or iPod touch (2nd generation)."
Yes. Yes, it is. The iPhone 3G and iPod touch (2nd generation) are totally capable of supporting this feature. There's no reason why this perfectly simple data transaction would be beyond the sturdy little iPhone 3G and/or iPod touch (2nd generation). In fact, for about a week after iOS4 rolled out, my iPod Touch (2nd generation) was happily syncing notes without my telling it. Then with the next update it went away, because Apple had decided that this flavour was perhaps too EXTREME for a mere second-class citizen like myself.
This is not a question of hardware limitations or compatibility, Apple, and don't try to imply that it is by way of your ambiguous "not supported" phrase. It's only not supported because you've decided they should not support it. This is another clear example of you arbitrarily withholding a feature from your customers purely in order to get us to buy the newer model.
There goes any sense of brand loyalty I may have had. So, these HTC Desires, then...
 "Sync" is a word which is here used to mean "backup", as it only works in one direction - it makes a copy of your notes on your mail server. Handy for copy-and-pasting into another application on your PC, I guess.