According to Fortune,  Wall Street Heavy Weight, Michelle Burns has joined the Board of Circle.

“Burns’s move is another sign that Bitcoins are starting to gain some following among established financial players. She is the former CEO of human resources consulting firm Mercer. Along with Goldman (GS) , she is also on the board of Cisco Systems (CSCO) and the Elton John Aids foundation. She is also a former board member of Wal-Mart (WMT).

And her Wal-Mart connection might be the most valuable to Circle, and Bitcoin in general. A growing number of retailers are considering whether to accept the digital currency. Last week, Overstock.com said it would start taking payments in Bitcoins.

Earlier this month, the venture capital firm co-headed by Netscape founder Marc Andreessen, said it was leading a $25 million investment into CoinBase, which is a competitor to Circle.”