I unfortunately don't have a good answer for that.  Glancing at the coins right now, it looks like we have approx 2btc in unexchanged coins, these coins were all mined within a few hours of mintpal "upgrading", when everything was explained/looked like they would be down for a few hours for upgrades, and then back to working order.  Instead, they have been down (essentially) for a few weeks now, and some of the coins that were sent while they were upgrading still haven't shown up in the account.

At this point, I honestly don't know whats going on over there.  The original site was working fine, and then they botch an upgrade pretty majorly, and now they're either closing down, or changing management (@moolah_io on twitter seems like he's saying completely different things about what is happening every few hours).

Essentially if the exchange comes back up and our deposits show up, we'll withdraw the coins and try to manually exchange them on whatever exchanges support those coins (if there are any).  If we can't recover those coins (way too early to tell) they'll probably be written off, as there really isn't much we can do there.

tldr; we wait and see for now.