Well, I thought I might as well stop lurking and post something... Beware, spoilers
What with the hype around Saw, (and the fact that, being a children's park, Legoland will inevitably receive less attention), the opening of Kingdom of the Pharaohs was bound to be forgotten to some extent. Nevertheless, Friday was indeed the big day, and Legoland Windsor now has an eleventh park area.
The opening ceremony on Friday, even though delayed by half an hour, was quite fun - it was held by Vicky Brown, Legoland general manager, with the UK ambassador for Egypt, and the UK and Ireland general manager for Egyptair (sponsors) cutting the red tape.
Laser Raiders, I think, is very good. Queuing takes place in half of the old circus tent, and the theming and attention to detail is actually really great. Lots of models, many recycled from the now-closed Explorers' Institute.
At the end of the queue, you are ushered into a small room, where you're shown a short video (back-story and safety briefing). You're then directed down a short tunnel made like a temporary marquee, which is a huge shame. The queue-line is dark and well themed, the ride building is dark and well themed, but the tunnel connecting the two is light and bare. Also to be noted is that the tunnel cuts across the Orient Expedition, so every now and then it has to be blocked off to allow the train to pass through. That's really slowed down the Orient Expedition terribly, but I hope that being brand new it's just teething problems.
At the end of the tunnel, you queue again to board the vehicles - again, teething issues I hope, 'cause otherwise there is a definite feeling of having to queue twice. The ride itself then appears to be an exact copy of that in California (judging by the video linked by Johno above) - same scenes, same models, even same track layout... it was clearly made from the same plans. However, it's really good fun - I rode it three times, and on two of those occasions planned to pay more attention to details and the mechanics of the ride, but instead I ended up shooting as many targets as possible! (Perhaps I just have a short attention span...). The only big criticism I have about the ride itself is the lack of actual Lego - unlike most/all other models in the park, those in Laser Raiders are just fiberglass shells, which feels like a bit of a cop-out.
You then exit the ride into the other half of the old circus tent, which now contains a new shop ('The Bazaar'), and Scarab Bouncers. Scarab Bouncers is good fun, but definitely aimed at very young kids.
Kingdom of the Pharaohs also include the old Brickadilly's Fairground Rides, which have been re-themed and have become Desert Chase, Thunder Blazer and Aero Nomad.
All in all, I personally feel that Kingdom of the Pharaohs has been done well. There are definitely some things that could have been done a lot better (namely that tunnel, and the lack of Lego models in Laser Raiders), but all in all, a good effort by Legoland Windsor :D.
If anyone's interested, I have a few pictures on my website here