And just in case people haven't realized it yet, the coordinates actually point to the entrance to the Universal Orlando resort on Kirkman Drive. When using only two significant digits for lattitude and longitude, you've got a pretty large square you're dealing with. If someone were standing at the resort entrance and grabbed their lat/long, then truncated them down, the coordinates on the LT site would be the result.
Try this: go to this website and input 28.477811 for Lat and -81.459085 for Lon. Press the "Set" button and then zoom in on the map enough and you'll see what I'm talking about.
As for the HHN website, I agree that there probably aren't any clues in the "20 Years of Fear" section, but I suspect that the photos being posted on the lantern page are the ones from the infamous "images.zip" file attached to the e-mail from Universal. I think that what the Universal employee sent to the LT Cell Director was the image files that Uni was planning to use in their promotion of the event.
Obviously, the three posted so far don't reveal anything worthy of the reaction that the Cell Director had, but I imagine the final ones posted will give an explanation for his/her fear.