I agree with Kilhoffer; I prefer to see descriptive variable names in almost every context. I will abbreviate if my variable names are longer than 20 characters or so, usually with words in the variable name (eg: "SomeVeryLongVarValue").
Of course, I also use hungarian notation whenever I can, so I might well be in the other extreme camp of trying to make my variables names overly descriptive, depending on your perspective.
