Per the convention’s web site, all of the previously announced guests will still be present and any registered attendees who are unable to attend on the new dates are requested to contact the convention committee.
The Farpoint Convention has a new web address — http://www.farpointcon.com/. They’ve actually had that one for a few years, but because it worked through a redirector, a lot of people didn’t know about it. And just to confuse things, Google is still redirecting people to the old hosting provider, which has out-of-date information.
So if you’re planning to attend Farpoint, make sure you check out http://www.farpointcon.com/. (Fanboy’s convention list has been using the new address since the 2003 event.)