What about allow exchange sharecoin directly for doge/mint/ecc to avoid this slow bitcoin blockchain?
Yes, I kind of expected this to be available. Since it is "the" ShareCoin exchange you should be able to buy all coins on the exchange with SHARE... rather than COIN/BTC it should all be SHARE/Coin. So, SHARE/BTC, SHARE/LTC, SHARE/DOGE, etc.
Make Share as basic coin as BTC is? A good idea.