Clearwire CEO Ben Wolff has been tapped to deliver the keynote address at the Wireless Communications Association International annual convention June 13 in Washington, D.C.

Clearwire said Wolff will discuss the company's experiences as it implements its vision of wireless high-speed Internet and personal broadband services.

On Wednesday, Clearwire said Chief Strategy Officer Scott Richardson will keynote at WiMax World Europe in Vienna.

Wondering if these apperances are attempts to lift the company's stock price?

Clearwire's stock has dropped dramatically recently over concerns that it will have to raise billions of dollars more to roll out a network. This afternoon the stock was trading up 18 cents to about $17.77 a share. The Kirkland company is scheduled to report first-quarter financial results on May 8.