Alright, alright, I know this subject is a beaten horse, and many people have incredibly differing opinions on it.
But, recently, after clearing out my brother's room (he left for college, it's now my bike crap storage unit), I found a product called Chelsea Leather Food. It's a leather nourishing/waterproofing/polishing cream that claims to do all those thing without ridding the leather of its natural qualities and without stretching the leather or stitching.
I mean, it's even made in England like Brooks. Have you guys ever used this, or heard of it?
Oh, and the reason my brother had it is because he's a soccer player and used it on a very specific set of his cleats made of Kangaroo hide...yeah, weird.