Update: This looks like it was a false alarm. Facebook was blocked for a few people but seems to be ok now. Apologies - bonk
======================================
I've just seen a blog post (forgot where) that facebook is blocked in the UAE. http://www.facebook.com/ is still ok for me but http://www.facebook.com/home.php is blocked, and the local radio station is getting messages from people saying it's blocked.
1. If you can still access it, I'd suggest you back up your account before it does get stuffed by SaladCrap. Assuming you can (I don't know if you can back up?).
2. Set up a blog at www.blogspot.com (it's easy).
3. Put a message on your facebook homepage redirecting visitors to your blogspot website.
4. Then at least any lost visitors will still find your latest update - post on blogspot.
One PITA is that blogspot have just relaunched in Arabic for the UAE, so if you can't read Arabic, it may be a bit tricky signing up (I couldn't find an English version - they obviously check your IP for which country you're browsing from). Try signing up to gmail, and then starting a blog account once you're logged in (google owns blogger.com/blogspot.com).
Alternatively, use a different online blog website provider.
Good luck, and if facebook doesn't get blocked, all the better. But it doesn't look good for the UAE.
PS - if I sound a bit unfamiliar with facebook, that's because I don't use it, I just have a vague idea of the general principal .