This is an image that was sent to me via email... what does it mean?

There is a rumor going around that some of our members of our Message in a Bottle Exhibition are affiliated with a secret society. We have noticed that our web designer had embedded something weird things in our Message in a Bottle page of our website, but we had overlooked it until today, when I found that there is a hidden section of the site only accessible with a password.

I tried in vain to unlock it, but I think I need to look somewhere else for the clues.

I received a note today in my email from someone tipping me off that some of the artists involved may be quite involved and might know something we don't know. They told me to 'look for the letters that reveal' and that 'the mix of clues will open the passage." They asked to remain anonymous.

I am thinking that I might look and see if I can find any clues in their sites or blogs. I hope I can solve this and see what's going on. I'd like to get to the bottom of this.

If anyone finds anything, let me know.
I'll keep you posted on what we find out and if we see any other clues to who or how this got here. Until then, we'll be looking ourselves.

Good luck.