Hey paul,
How are you... Although, myspace.com is a good way to attract new customers, I personally don`t recommend it. I had bad luck with them once, where I posted an employment Ad. All you get is a bunch of kids calling you. I hope this doesn`t happen with you. You Should Try this instead: Share A Sale. Its a Banner Exchange System. I use it and the extra revenue you can make is great
http://www.shareasale.com/r.cfm?B=70&U=121993&M=47
Myspace seems highly effective for networking and publicity to the under 30 crowd. If you have a product, service, idea or website that is geared toward the 15-30 year old sector then I would definitely recommend myspace. We have tracked a large % of web visits and sales through myspace.
I guess I would be skeptical if your market has little to no affiliation with myspace. It seems a company can lose credibility if it chooses the wrong venues for publicity.
Hello everyone,
My recent experience using MySpace has been great with attracting nitch traffic to my website. Many of my very selected "friends" are over 30. I get to target teachers, parents, and people into science, nature, and bugs (plus hot girls...just kidding). You get out what you put into it. MySpace is great for feedback, targeting your market, and building relationships with potential customers in a friendly non commercial setting. You can see how I set mine up. It`s very basic but it`s not bad for someone over 30! 
http://www.myspace.com/coolbugstuff
Have a creepy crawly day!