[Edit - Bitparking just agreed to extend the trading and withdrawal deadlines - you can safely ignore this thread. See this post for details:
https://bitcointalksearch.org/topic/m.1752561]
Note the question-mark - this isn't certain. Please excuse all the links, but for this one I thought I should really provide some kind of source for every point.
Terracoins have been shooting up in price in anticipation of their being added to the BTC-E exchange.
https://bitcointalksearch.org/topic/does-anybody-realize-that-trc-and-ppc-are-about-to-go-off-the-charts-167009Vircurex has been inaccessible for some time now, due to DDOS, apparently having data center trouble, and there is no idea when it might be back.
https://bitcointalksearch.org/topic/vircurex-and-btc-e-in-ddos-168085https://bitcointalksearch.org/topic/btc-e-and-vircurex-down-168089(Some people have said is was actually hacked, though I don't think I believe this).
https://bitcointalksearch.org/topic/vircurex-gets-hacked-168079That leaves
https://trcexchange.bitparking.com/ to get them at, which is closing for trading in a few hours.
https://bitcointalksearch.org/topic/bitparking-terracoin-exchange-closed-137718After that time, you still have several days to get your coins out, but you can't buy TerraCoins anymore on that site.
I'd be surprised if there wasn't a bit of a panic buy in a few hours. Then again, Vircurex might come back in 10 minutes and Terracoins will go back to merely doubling in value as normal.
Note (and this isn't said enough in these heads-up posts): please do not risk more coins than you can afford to lose, or leave too many of your coins in any one exchange. Altcoin trading may be returning 10x returns lately, but it is also risky.
