First of all: Sorry for the poll vs. the title of the thread. I saw afterwards that it might look a bit misleading.
Second of all: Thank you very much for that interesting, inspiring and insightful answer, Norbert!
1. That's what I felt too, I just wasn't sure if I were right

Very good and interesting to hear from another person in almost the same category as me! Well, I just moved out from home 1,5 months ago, to live with my girlfriend. So, there's some things that has to be paid for, such as the rent for the appartment and food. We still don't have a car though (even though I really want one). But I'll try to wait as long as possible. At this time only my girlfriend have a job. I have some savings, so I'm making up for it that way, but it won't last long. So I better get some things done quickly here, I don't want her to suffer because of me
I've tried to explain to my girlfriend that she can't expect that my business will make money right away. I'm more concerned about it making some kind of value for others. This is a very important thing I've learned, by reading Steve's posts. But she, on the other hand, just want to see money right away

My goal is, that in the long run, I can make a living of this (or something similar, if this flops completely), but the most important thing is value. If I get more and more artists willing to use my site, then there's a sign that I'm doing something right.
2. Yes, it's a internet startup. But what exactly does "startup" mean? I guess it's pretty much what it sais, but I was reading on Paul Graham's site, and was wondering what exactly he talked about. Thanks for the links!
3. I can understand why you are a bit concerned about my idea, when you haven't heard all of it yet

Yes, it's already similar services out there. But I haven't seen anything quite like what I'm intending. I just didn't want to say too much before I've actually done something myself. A few hours ago, I registered the domain, and soon I'll be working on the site. I'm really looking forward to it. I think it's a pretty new way of thinking, and hope others see the potential it can have.
4. I'm not sure if I fall into any of those categories. But yes, I'm doing this to learn, and to see if it can work. I'll do my best not "dying", even though things go slowly in the beginning. That's the way it has to be. I do not expect any overnight success here. It will take time for people to discover it. And when I say "people", I mean both potential musicians and potential customers.
Thank you so much for those last, inspiring words. I think that was exactly what I needed to hear. I'll definately go for it
Oh, and like I read on Paul Graham site: Now, that I've announced my little "business-plan" to the world, it actually WOULD be a bit embarassing if it didn't work, and that inself will make me work harder on it to actually make it work. And that, combined with "not dying", I actually believe that I have a fair chance. It's really up to me.