Lists showing where the latest version of feat X is?

[Elodan]

Anyone know where one can find listings that tell where the latest version of a feat/spell/prestige class/etc. is. I think the Bladesinger PrC is a perfect example of what I'm talking about. In Source A it was originallty presented, in Source B it was slightly modified and in Source C there was a slight modification of the slight modification, I'm looking for something that shows:

PrcA Source B
Bladesinger Source C
etc.

I'm specifically looking for Realms related feats/spells/etc.

Thanks.

 

[MatthewJHanson]

WOTC has some nifty indexes that is pretty close to what you're looking for. It just lists the sources, not which was first, but you can probably deduce that part.

 

[patrickjarrell]

I don't remember where exactly, but Wizards has a pdf file on their site that tells you where updated versions of 3e spells, classes, and feats can be found.