Matt Sarnoff wrote in to let us know that his ChipDB project just went live:

Instead of digging through hundred-page PDF datasheets to find the pinout of a microcontroller or logic chip, you can use a simple URL scheme (example:
http://msarnoff.org/chipdb/atmega168
) to get the data right away.

Its collection is currently small, but includes the most common chips; Atmel microcontrollers, 4000 series, 7400 series, LMxxx series, and more. There’s a bookmarklet for one-click lookups and a keyword search that lets you find a part even if you don’t know its number.

Users can contribute their own entries to the database. Since the site is in its infancy, I currently moderate all submissions, but I hope to change this in the future if demand is great enough.

ChipDB – integrated circuit quick reference