Actually, you CAN buy bitcoins in an IRA today, you don't need a third party like Second Market, and you don't need to be an accredited investor. Companies like Broad Financial can help you set up an IRA LLC that is wholly owned by your IRA, and which you manage. The LLC can buy a wide variety of assets, including bitcoins. You can secure the private keys yourself, and you don't have to pay someone else annual fees to do it for you.
If your IRA LLC that is owned by your
Roth IRA, as long as you're age 59 1/2 and follow all the rules, the gains are not taxed. If bitcoin is successful, this will save you tons of money in taxes!
More details at
https://bitcointalk.org/index.php?topic=396783.0.