I am in the same boat with low GPA (tough school). Hate to break it to you, but our chances are a lot lower than those with high GPA at easy schools.
What it comes down to is this, unless if you're ex marine in iraq who started his own company, or have rich parents, or are half black/half latino guy who worked for unicef, your low GPA pretty much kills any shot at top schools. This is especially true for years like this when the economy is bad, ie more superstars applying.
Yes it is unfair, but schools would rather have a high GPA, even if its from an easy school, it looks better for them statistically. Remember, a lot of schools that are really good, such as some Ivy's, are known to be easy graders with most getting high GPAs and MBA programs will take those guys over you. There are also geniuses at tough schools like MIT/Chicago/Berkeley/IIT/Peking Uni/etc, who still get high grades even at tough schools (in your case, the top 10% of your class) and MBA programs will take those guys over you. There are also people from easy and fairly mediocre schools, but they get high GPAs. MBA programs will take those guys over you too.
As an example, I know a guy from USC with a 3.1 GPA, 720 GMAT who got into Columbia, regular demographic and work experience. I know many other people with profiles like his (3.1 to 3.3 GPAs from mediocre schools) who get in to top MBAs. Another guy I know from MIT has a 2.7 GPA, 720 GMAT, who gets dinged everywhere. I know a lot of people with similar profiles (sub-3 GPA, top schools) who get dinged at all the top MBA programs. I talked to them extensively about their app execution, and they both worked hard on apps and most likely executed their apps equally well. We all know that a 2.7 at MIT is probably at least a 3.5 at USC, but the process is unfair and there's nothing we can do about it.
We are basically being punished for getting into a tough undergrad program. But that's the way it is, I'm on the same boat as you. Zero chance at H/S/W, maybe 1-5% chance at other top 10. I am aiming for top 15-20.