James Hudnall points to this tale of the truly weird. For the second time, as his commenter notes.
Should this prove to be anything like what it appears it might be, the most important question I can think of is, does the RF generator require more or less power to operate then the released gases can be used to generate? If the answer is "less", then this may prove to be the most profound bit of serendipity ... well, ever.
UPDATE: Prof. Rustom Roy mentioned in the Post-Gazette story has a web page here with a link to video of the burning salt water.
This is a May 5th news report about John Kanzius and his invention of a promising cancer treatment. Using the same equipment, his further discovery concerning salt water is covered here. Both stories are from the local Jacksonville, Fla. NBC affilliate.