If squats and lunges aren't activating your hams and glutes, you're doing them wrong lol! Add weight, go slow, try planche (sp?) lunges- straight back leg, and stepping out an angle instead of directly forward, and make sure you're sitting back on your squats, not tipping forward.
And women naturally have much stronger quads apparently than hams/glutes.
Stats: 5'6" female, 21 years young
Starting Weight: 187 lbs (March 2010)
Current Weight: 143 lbs (Oct 2011)
Goal BF: 20%
Super D Omega 3 daily & BCAAs preworkout