1. Lose the free theme. I think some 'startups' can get away with a crappy generic design when they sell a good compelling product. In your case, your design skills are your product. So you are giving a really bad demo right away.
2. You're selling visuals, so go the simple visual route. Showcase your demo logos first in your page, maybe in a slideshow. Big beautiful crisp logos. Then a big, clear call to action: "Get a custom logo for $249".
3. Are you a trained designer? Please don't take this badly, but your demo logos are not as good as they can be. Take this advice from a 10-Year designer who has come to accept that he sucks at logos. I think the problem is with the typography, it looks odd-spaced and rushed. You need to spend more time refining your type skills.
4. Your characters and symbols are very good, though. The bear is funny and well-drawn and the cupcake is cute. I'll make a wild guess and say that's your strength. You should feature your strengths.
5. You really need to make a KILLER ZestyLogos logo. And make sure it's very Zesty (whatever that means).
Good luck pal.