Alan told me (presumably by way of Daring Fireball again) about Adobe's brand new geometric sans serif typeface Hypatia. However, I'll do both of them one better and note that the designer, Thomas Phinney, talks about it on his blog too. Phinney also mentions on his blog that there Adobe has also just released a new typeface by Slimbach called Arno. It looks pretty nice; it would be interesting to compare it with Minion Pro. I couldn't find any pricing information, but if it is anything like the pricing for the other »Pro Optical« typefaces it is out of my league for the moment.
While checking out more of Daring Fireball myself I saw an entry about photos of an 1923 American Type Foundry specimen book on Flickr. I'm not sure whether there are any copyright issues with that, but it is there for now.