Even though the banking industry and US regulators are getting on board the bitcoin train, actually spending your hard-mined bitcoins can be a bit tricky. Luckily, Coinbase debuted a solution on Friday: the Shift debit card. It's the first such bitcoin-based debit card issued in the US and is backed by VISA. With it, bitcoin users will be able to shop at both on- and offline stores -- basically anywhere that VISA is accepted. The card is linked to your Signing up for the card simply requires filling out this form and paying the $10 issuance fee (in bitcoin of course).There are restrictions, however. First, users must live in one of the following 24 states: AL, AZ, CA, DE, DC, GA, ID, IA, KS, ME, MS, NE, NV, NJ, NC, ND, OK, PA, PR, SD, TX, VT, WA, WV. Also, there's a $1000 overall transaction limit with a $200 - $500 cap on daily withdrawals on top of the $2.50 you'll pay every time you hit up the ATM with it.