[@Mahz] My thought with the Mentoring tag is that it would only be used for helping people learn the ropes in one system or another. Having it simply be an additional tag would be the easiest thing to implement, but if you want more ideas, I might be able to help with some.

1) If you implement a forum dedicated to mentoring, linking threads that are tagged with Mentoring into that thread might be helpful (especially if it's split apart into the different types of RPs like the forum is). Perhaps even just interest checks or threads that have been posted in within the last month so things don't get too cluttered. 

2) If the Mentoring tag was a different color, showed up first in the list, and had specific rules for use (perhaps that showed up when you first select the tag), that might also aid in people finding them. People who create Mentoring RPs should be aware that they are inviting questions about literally everything and should be expected to assume a slightly higher level of both professionalism (as they represent the RP and the genre as a whole) as well as the responsibility to answer all of those questions to the best of their abilities.

3) Perhaps an eye can be kept on some of these Mentoring RPs. We could have a sort of monthly recognition for ongoing RPs that work to improve the quality of their players' skills. This would obviously take a lot of extra effort, but it would both bring attention to the feature and recognition that this feature is a priority in the Guild. The latter makes the Guild more accessible to newcomers and would likely improve first impressions significantly.