^ Midwestern companies???? they would be good advertisers if it is solely local based. What is your expansion plan?
Trust me it's small at the moment, 70 people in the mid-west chatting is bound to have have a decent mix of guys and girls. When you're site begins to grow I would imagine this would change and the balance will need to be kept, which will be very hard. I would do all I can through incentives to bring girls to the site.
About getting guys to open up, I would have a tips page on attracting the desired sex. Suggest that putting up a picture of yourself could increase your chances of success by XX%, I dunno, you do the research lol. Guys can be just as insecure as girls, in fact some are more insecure.
I'm trying to help, but I'm shooting hidden targets with a blindfold around my eyes. If you want constructive critisism and genuine help you need to tell us certain information such as...
Business plan (gen.)
Expansion plan
Target consumers
Marketing strategies
Market research you have conducted
Your background in this industry
...And so on
Also, remember that if you want to earn serious $$$ it will never happen overnight, it will require dedication of 10-12 hours a day for several years before you start raking it in.
Edit: Just looked at your site, some thoughts
Layout is OK, but some major tweaking is needed, this will be done over the next few years though so no need to worry.
Wouldn't personally use it myself (well I have a girlfriend) but I was greeted with some fugly and dull looking members on the front page, no offense to your clients.
Advertising seems to be pretty intense I'm afraid, I think it is because it blends in with your site. Try some flash banner ads, like the ones here. It will take a lot more member to get noticed though.
Colour scheme is good
Looks a little difficult to find my way round, but I suppose that's down to the client.