Here's a downtown telephoto shot (300mm) from the hill on I-30 east near the Oakland Exit. The Landmark Tower to be imploded in March is the next largest building to the left of the Carter & Burgess Building.
If your wife has access to a southside office fairly high up, that vantage point could offer spectacular pictures of the event. Since it's on a Saturday, a humble photog would not upset the office routine. You might check it out.
For anyone reading this, desiring to know more about the big "implosion," read this thread:
http://www.texasphotoforum.com/forum...ad.php?t=16524