In reply to Motown:
It's 13 years since I was last there, but keep in touch with some of the UAE guys. They still climb there occasioinally, but getting there is a faff and can be reasonably expensive depending upon what visa you need to get. They tend to save those trips for a long holiday weekend.
Not exactly sure what the access from the Omani side (Sohar Road) is like, as there is a major border / customs post just before where you would need to turn off the main Buraimi highway to get to Wonderwall. An alternative route from Muscat would be through the mountains via Ibri - but that way you pass a lot of the good Omani climbing areas. It's one of the reasons that traditionally WW has been the preserve of the UAE based climbers as the northern end of the ridge is literally 100 metres inside the UAE / Oman border fence.
Back when I was there there were no fences or border posts to negotiate, and it was a good place for a summer's afternoon cragging if you did not mind the heat or the 2 hour drive each way. The humidity was much lower there than at the coasts, and you could always be guaranteed a breeze. The wall gets afternoon shade and many of the first ascents were made in the summer. 'Mad Dogs' was one -- climbed by Englishmen who walked up to the base of the wall 'in the midday sun'.