Series C Preferred In March 2011 an affiliate of the Company converted 549,109 shares of Series C preferred stock into 54,910,900 shares of restricted common stock reducing the outstanding Series C from 860,160 to 315,060 or 63.4% reduction.
And according to rule 144A, a holding period of 1 year after those preferred are converted to restrict-ed's that they can be converted to commons... so that puts it at March '12.... I pasted info/link below that I always reference
For non-affiliate holders of restricted securities, Rule 144 provides a safe harbor for the resale of such securities without limitation after six months in the case of issuers that are reporting companies that comply with the current information requirements of Rule 144(c), and after one year in the case of non-reporting issuers. (Prior to the December 2007 amendments, the holding period was one year.) In each case, after a oneyear holding period, resales of these securities by nonaffiliates will no longer be subject to any other conditions under Rule 144.