There are currently 82 towers proposed or under construction that are marked on the Dubai skyscraper map. Have a look - http://skyscraperpage.com/cities/map...&z=13&status=1
There are two distinct clusters of development activity. One around SZ Road/Business Bay and the other at Dubai Marina/Jumeirah Lake. Pan around the map to see them all.
Here's a close-up satellite view of the supertalls U/C at the Dubai Marina - http://skyscraperpage.com/cities/map...6&t=k&status=1
If anyone can offer any updated information or locations of missing projects it would be very much appriciated, and I will add them to the map. Thanks!
Also, if you want to view all existing highrises on the map, simply click the "Built" checkbox on the left side of the map page. 375 towers in all, so far.