I got a mystery charge on my Master Card in February 2010 from mycomputerfun.com and I've never, ever heard of, emailed, phoned, or otherwise transacted with this company or anyone in it.
They simply got my Card number and dinged it for just under $5. Total identity theft! I filed a fraud complaint with my card company and with IC3 (the Feds).
Stay away from any dealings with mycomputerfun.com If you Google them you see many complaints over the past six months that are similar.