Here is some photos takes on December 18th, 2007 of soil testing going on at the Al Burj construction site. As of December 18th there are 4 drilling rigs on location doing soil testing, once soil testing is complete construction can then start.
Technical Data of the Al Burj:
Height to tip 1,050 m (3,445 ft) varies
Height to roof 850 m (2,789 ft) varies
Height to top floor 850 m (2,789 ft) varies
Floors 228
Total Built-up area 1,490,000 m² (16,038,200 sq ft)
Usable Space 492,000 m² (5,295,800 sq ft)
Usage Mixed Use
Company
Developer Al Nakheel
Architect Woods Bagot
Engineer WSP Cantor Seinuk
Here is a model of what the Al Burj "Tall Tower" on completion might look like.