It's been a while, but I realized recently that I didn't make a project log for the 4th revision of the PCB that I did in February. The main correction was that the silk screen label for one of the I2C connectors (the 4-pin Dupont connector) had the pin ordering reversed. That wasn't a huge deal since I could just make sure to point it out, but it seemed a little unprofessional. A run of PCBs is pretty cheap if you are not in a hurry to get them. I think it cost me US$12-13 and I got the boards in about 2 weeks.

I'm sure I did some other little non-critical tweaks, like evening out the exact spacing between like components, but it's been so long that I've forgotten what those other tweaks are.

For the record, here is the board I am currently using.