Correct me if I'm wrong, but it's my understanding that the gametdb xml hasn't been maintained for a while - so if access to the xml is the issue, rather than the formatting - wiiflow could point to another host - perhaps the wiiflow wiki or abz' masterpack.
fledge68 would this be amenable to you?
If alternate xml hosting is an option,
Wiimpathy has spoken about including the metadata for many of the console games - if those data sets could be rendered into the gametdb xml format...
I don't know what the solution is, but we should bang heads to get this working and I'm happy to help.
EDIT: I might have misread your first post! I'm a bit unclear about the differences in the formatting - would it be possible to batch process the categories ini into an xml, or is it something that needs to be done by hand?
EDIT #2:
I gather from a PM that alternate hosting is unlikely to happen because lustar might get upset. No disrespect, am I wrong about it not being updated?
How about having wiiflow refer to an external ini for the database url, so that users can choose an alternate if they wish.
Abz, sound like an idea for the masterpack?
By extension, this might be a way to auto download from mastershoes cover collection. Or even other artwork and content. Just riffing, like
EDIT#3: Thinking on this -
drakorex did a lot of work on a similar idea - I was hoping you might have something to add?