Directly buy "powered up" Steem
BlockTrades (http://blocktrades.us) has added #Steem Power to its “instant exchange” engine, enabling users to directly purchase Steem Power with popular cryptocurrencies such as #bitcoin, #bitshares, ether, and litecoin. BlockTrades added support for buying Steem a few weeks ago, but now it's possible to buy and "power up" STEEM purchased from BlockTrades in a single step.
Below are direct URLS for buying Steem Power with bitcoin and bitshares:
https://blocktrades.us/unregistered_trade/btc/steem_power
https://blocktrades.us/unregistered_trade/bts/steem_power