The VS400 on 2nd July is currently scheduled as an A346. A346's should be doing this route from now (DXB went daily yesterday on A346's) unless there is a change of aircraft for operational reasons.
Jumeirah Beach Hotel is great, very central, has a lovely beachfront location, free shuttle to the Emirates Mall and more bars and restaurants that you can possibly use. I would not hesitate to recommend it.
Id certainly recommend trying Ski Dubai and getting out to the desert - you could not choose two more diverse but equally wonderful activities! The desert trips seem to be popular so i would book that in advance if you do decide to give it a go. Wild Wadi is also very popular if you like hurtling yourself down watery slides - i do not (but its a great spectator sport)!

There is a plethora of information on Dubai in the various fora as many of us (myself included) have been there since the route launch in March. Try
here and
here and
here for some recent threads, or use the search function at the top of the page with the variables 'Dubai' or 'DXB' and i am sure you will find lots more information.
Have a fab trip!
Thanks,
Sarah