Updating someone else's addon?

[gwyd]

Hey guys. I've been using oUF_hank for a couple of years now and it's great. Hank no longer plays and I haven't found anyway to get in touch with him. What is the general etiquette for updating other people's addons? I've got it pretty much completely functional for 5.0, but I'm really not sure the best/right way to make it available to others.

Thanks!