Bermudagrass (or any lawn for that matter) destruction.
I am unwilling to care for a lawn in my area (I don't care how attractive others may think they are, too much water, period.) Unfortunately, in spite of our completely rainless summers, we are not hot and dry enough for bermuda to actually die back, wholly or in part if irrigation is witheld, additionally, there is a brief period in spring when soil moisture and temperatures are suitable for growth. This means that simply ignoring the stuff, planting adapted plants during the rainy season and letting nature take it's course won't work.
Solution: After reading about a reforestation project in Florida I decided to have some local tree service companies dump loads of shredded trees (they were only too happy not to have to pay a disposal fee for the "garbage") on my front yard. I spread the mulch 12in thick over the entire area, and come fall I'll pull back the material in spots and plant trees and shrubs, by next fall it should be broken down enough for annuals and perennials to root.
Preliminary observation: I pulled back the material in several places 2 weeks-1 month later (depending on the area, I did not receive the mulch all at once), and discovered that the soil, which was bone dry at the time I laid the mulch, is slightly moist (I have not watered and there has been no rain, just residual moisture from the chipped trees). On top of that, what bermuda I found (most not in evidence) was greyish brown with no green or white areas in the center of the stolons and rhizomes.
I sometimes begin to think I'm not crazy after all, until I remember that the experiment is merely symptomatic and not the disease itself :).