I've read that you can also participate via shapeshift ? if I remember well, there is this option. it would be very comfortable having other coin available and for maintaining the bitcoin in the weeks of the presale. what do you think?
No I think what they actually meant was the internal wallet on the block app can be funded from an external ether wallet or via shapeshift from within the blocks interface when making a purchase. But for the ICO, you can participate with BTC, ETH, ETC and WAVES.
Right. Anyway you can find more details here: