Maybe a word regarding the instant exchange function.
Beware if you send too small amounts. We had an example this week where someone sent 0.5 RUBIT to his deposit and wanted instant BTC in exchange. At the current exchange rate, the result was 0.00000012 BTC, which is way below withdraw fees. So make sure the result is at least above withdraw fees. In the meantime, we'll be working on computing and showing some sort of minimum value depending on selected coins.
If you have many small altcoin deposits and want to convert to BTC, one way to automate that would be to use autosell and autowithdraw. You'd need to create an account though. Set autosell for your altcoin deposits and set an amount for autowithdraw on BTC. This way, your account will accumulate BTC and withdraw them when you reach the specified amount.