Followup.

I haven't been able to uncover much. I believe "Paul Probo" is a pseudonym for an actor, or unknown character at this time, as of now, they are posting on the Summer Glau pages in what appears to be an official capacity. Probo, when accented and translated from spanish, means "proves", leading us to Paul Proves. I cannot think of any series tie-ins with a character named Paul, but I am going to re-watch as much of the series as I can tonight.

The pseudonym, "John Dowses", is an anagram for "Joss Whedon", who of course was the creator of Firefly and director of Serenity. What does this mean? Who knows at this point, but it's becoming more and more intriguing.

Updates as they come.