[Patrick](https://mechanics.meta.stackexchange.com/users/5/patrick) would be a good choice as a Pro Tempore Moderator.  Here are his credentials:

- High reputation on the main site, indicating regular, active participation. [Patrick - Main Site](https://mechanics.stackexchange.com/users/5/patrick)
- Several posts on meta that help define the direction of the site, such as what is on-topic and off-topic. [Patrick - Meta](https://mechanics.meta.stackexchange.com/users/5/patrick)
- Has followed through on at least 2 committments and is committed to other yet-to-be-formed sites as well:  [Patrick - Area51](https://area51.meta.stackexchange.com/users/28099/patrick)

This user also seems like someone that would read [A Theory of Moderation](http://blog.stackoverflow.com/2009/05/a-theory-of-moderation/) and do his best to adhere to those principles.