I haven't been reading Mentalist fic recently (trying to avoid spoilers as we're behind in the UK), and I'm terrible at bookmarking, but let me see what I can give you off the top of my head...

(I apologize in advance for having no idea how to do proper user name/weblinks in a comment!)

X's stuff is very good, and their home page can be found here: http://www.tenebris.org/x__art/index.html

It's Jane/Cho, and if that pairing boggles you slightly (it did me at first), at least give it a try, because the writing is excellent and totally sold it to me.

If you haven't found Pensieve yet, then her fic journal's here and you should definitely take a look:

http://community.livejournal.com/idontsavedays/

Aaaaand, you're going to think I'm a freak for this, but Oruboro wrote Tentacle!fic for this fandom that I totally love:
http://oroburos69.livejournal.com/3081.html#cutid1
And check out the rest of her journal.

And the following is heartbreaking and beautiful from Dsudis:
http://dsudis.livejournal.com/541955.html

And you've probably already found the kink meme to find my Mentalist fic in the first place, but I include it for completeness as there's some good stuff there:

http://community.livejournal.com/slackerlicious/859.html#comments