Reloading modules

[Webb Sprague]

First--greetings, and thanks to all the people that made Erlang happen. 
 It is *really* cool.

Is there a way to reload modules that you change in the shell. 
 Basically, I just want to test them, change, test, etc.  If I need to 
write something a function, that would be fine, but this would help me 
out a lot.

I did search the archives a little bit, but I couldn't find anything.

Thanks
W