You can donate money and specify that your donation be used only to send John _to_ the 2007 Worldcon.
The next most common question was "Why not a special one-off fan fund for me?"
Sorry, I do not think that I can manage more than one special one-off fan fund.
The least most common question was "John is a lawyer. Why does he need a fan fund?"
To which I replied, leaning forward and lowering my voice, "Maybe he's not a _good_ lawyer." On one of these occasions a third party rushed to John's defence, but not that of his profession: "Maybe John's an _honest_ lawyer.
If you are not sure you know John by sight, on the Google home page, click Images ~> type "John Hertz" ~> click the Google Search button.
John is the John Hertz wearing the propeller beanie and/or Regency area clothing.