If possible would love to do this. Right now if a donor (or anyone) clicks the wmf logo in the left hand corner they get sent to the payments wiki homepage that is just a warning to log in. I'm not sure if interwiki links work on MediaWiki:mainpage ? If not we may be able to do it with the corehack for the default skin only since no one is logged in while browsing that wiki (assuming you can do that for 1 wiki with the set up...)

Version: unspecified
Severity: enhancement