Maybe I'm crazy, but currently there's no way to send someone a link to a custom function. The only link you can get is to the myfunctions page, which is very frustrating. This should work like workflow rules where when you click on one, it should have a link associated with it.

Furthermore when you're looking at the logs of a function, you should be able to click an edit button from that screen to edit the function. Having to go back and search the function again is very annoying.