My minions,
Over the last days I've worked very hard to upgrade te4.org to handle donations better and to allow many new things.
Balance Tab
First thing, you may have noticed a new "Balance" tab in your user profile which list all donations, DLC purchases, game purchases (like on Steam, Desura, ...) and so on.
Check that yours seems ok, if not please report it on ToME's forums.
Voratun Coins 
Voratun coins are awarded for each donation you make, for each purchase on Steam, ... for 10 coins per euros.
Voratun Coins are used to acquire DLCs and to unlock donator features.
*Every* donators get the donator features unlocked, even if they donated less than the "default" cost (60 coins), to keep in-line with the way things worked and just because I like being nice.
This means if you donated 5€ your balance will show -10 coins remaining, this is not a bug.
DLCs
For people who go above the minimal donation there is now the possibility to acquire DLCs. Yes I've said the D-word!
But DarkGod I thought you were a nice guy!
Well I hope I am yes (a nice dark god of pain and withering obviously!) but this does not prevent me from thanking people that go out of their way to support the game, does it ? :)
But DarkGod, does this means you will never give anything for free anymore?
Not at all my good friend! Updates to Tales of Maj'Eyal have always happened and will keep on doing so, for it is something I like doing. New DLCs will come yes, but free will always be free as I hope I have proven more than enough :)
You can find all the available DLCs there: http://te4.org/tome/dlc
Steamtech UI DLC
This is the first, and currently only, available DLC which can be found there: http://te4.org/dlc/steamtech-ui
This is the very same you can get on Steam (for the same price too obviously), as many people have requested to be able to grab it even though they do not have Steam. Now they can!
I wanted to have this available sooner but it required all the other stuff to be working first.
Now my minions, go donate, go grab DLCs, and most importantly, go enjoy the game (and die many deaths to fuel my Throne of Tears!)