TYPO5478 said:
No, only diviners get extra spells per day for divining.
I believe you have missed my point... and then were kind enough to explain specialist wizards to me.

I'll try again, but this time please assume I know what specializing does: yes, only diviners get an actual extra spell per day that is devoted to divining. But any wizard with this feat can use
any of their spells per day for divining. Which is
not functionally equivalent to having one extra spell, but
like having all your spells be "extra divining spells." If this doesn't make sense, feel free to completely ignore it.
TYPO5478 said:
I don't think the rules say that one of the spells a specialist learns every new level must be from his selected school.
Huh, you know I could have sworn that was in the PHB, but I can't find it in the SRD, either. I'll have to look again, but I guess I'm wrong.
Nail said:
Please quote the actual rules text. Thanks!
Actually, I went by a game store at lunch and they had this book and I looked up the variant rule. I cannot quote you the exact text, but it pretty much says exactly what the OP said: a wizard may cast "any" divination spell, and there is no mention of any kind of restriction (unless I just missed it, which is possible).
Now, whether or not "any" specifically means "any in your spellbook" is probably open to debate, simply because a wizard cannot normally cast anything not in his spellbook - without a use-item or another spellbook, anyway - which would seem to include any spell covered by this ability, but then again wizards can't convert spells, either, so it's hard to say. (And would a scroll or borrowed spellbook count as a possible source?) And I'm GUESSING that it would more-or-less restrict the wizard to arcane spells, since a wizard can only use arcane spells normally, but that's certainly fair for debate as well. In any case, I'm guessing this will be errata-ed SOON.