Two former executives from the Spiralfrog ad-supported music service have launched an advertising consulting group focused on digital media opportunities.

The company, Rebel Digital, was created by former Spiralfrog CEO Robin Kent and chief sales and marketing officer Lance Ford. They plan to sell advertising and develop marketing plans for Web-based music sites pursuing an ad-revenue model, like Spiralfrog.

Interestingly, the company's first client is Qtrax, another ad-supported music service set to launch this September. Qtrax today also announced a licensing deal with Sony BMG.

Both Kent and Ford exited Spiralfrog this past December in a top management shakeup that left many questions about the future viability of the emerging service. The company postponed a late 2006 launch to February, which has also passed. It currently is conducting a invitation-only beta trial in Canada.

Spiralfrog has content deals with Universal Music Group, EMI Music Publishing, BMI, and several indie labels. Qtrax to date has deals with Universal Music Publishing, Sony/ATV, Sony BMG, Warner Music Group, The Orchard, EMI Music Publishing and EMI Music Group, ASCAP and BMI.