Haste and Natural Attacks?

[TuggyNE]

And by that logic, unarmed striker builds don't benefit from Haste, yes?

Hmm, not sure. Instinctively I'd go for "iteratives = haste-friendly" (because that is one of the two most logical interpretations I can think of*), but that's not exactly what the spell says.

Maybe chalk another one up to WotC's lousy editing?

*The other logical interpretation would be Tvtyrant's: haste gives you one extra attack, period, divided as you see fit. In that case, of course, the "with a weapon he is holding" clause serves no actual function, which is not likely to be RAW.