I'd like to ask for advice/suggestions on how to overcome some weaknesses in my application. I'm planning on applying for full-time MBA for the class of 2016 during R1 of next year. I haven't taken my GMAT yet, but I'm studying for it now and I'm fairly confident I can score 700+. Here's my profile:

Age: 28
Race: Asian-American, born and raised in USA

Undergrad GPA: 2.9 in electrical engineering and computer science from top public university

Work: 7 years at a small financial services software company that leads in niche industry. Our clients include the top mortgage banks and lenders in the country as well as state and federal regulatory bodies responsible for regulating lending (with home loans being the top concern of the day). I started as an analyst and am now a product manager, working directly on a daily basis with the leaders of every internal team, as well as with a big four firm on a client project

Extracurriculars: I have hobbies, but no real post-college extracurricular organizations. In college I was, at different times, vice president, historian, and new member educator of a social fraternity.

Right now I'm taking some courses through UC Berkeley extension towards a business administration certificate. If I can pull down 3.7-4.0 GPA on these extension courses, at this point, would that help to mitigate my low undergrad GPA? Are there other ways I can demonstrate that I'm a different person now than i was almost 10 years ago, and that I can handle academic rigor in addition to daily work obligations (would completing mbamath help an application?)

It's early, but here's the large list of schools that I've been considering applying to, in loose priority order:
Dream... may not even apply
Wharton
Sloan
Booth

Desired Schools
Kellogg
Haas
Ross
Fuqua
Johnson
Anderson
Marshall

Should I give up now or is there hope?

Thanks very much for your advice!