I spent 30 seconds looking in PSwiki, and did not see this topic... But then again it can be hard to find specific things there among the many gems of info, without scrolling and browsing...
I went to the link Tuxide dropped, and first entry in thread directed me to another thread, which seems to be on the old forum maybe? Either way, it would not open there. While the thread Tuxide dropped was a good start, it did not appear to be updated recently.
I would be nice to have a semi-official list somewhere to answer this. It MAY exist already on the official Pages, or on the PSwiki, if so, please drop it here, or we could update the list in the thread Tuxide dropped, but should remove the link directing people to not look at that thread but to go to a dead one (I could not open it, but may be firewall here at work, please advise).
Otherwise, you could put it elsewhere. The Yliakum Visitor's Bureau would welcome such a list, as such a list is very definitely OOC, and yet of great interest to tourists (people new to Yliakum). Just start a thread "How to find out which skills are implemented" under "how to" and add what you know, and we can flesh it out together.
if it exists and is being maintained elsewhere, drop the link and we can just drop the link there, easy peasy.