I'm interested in starting an ecommerce/ community website, how do I identify my market?

[Irish]

from the research I've done, no such direct competiton exists... so my market potential could be very broad, despite having something of niche at the same time. I'm attempting to write a business plan, but am stuck on the market research because I'm unsure of where my business would fall. Any ideas on how to narrow the field would be helpful.

[Francis]

Dear reader,
I roughly have the same ambition and might be ready to share some ideas if I can feel that ; you can post on my blog http://instantseoranking.blogspot.com/ and check how we can both boost our respective field of interests. I can later drive you through the way of getting worldwide audience whilst you would enrich my knowledge on ecommerce for instance.

May I ask you what is your specialty?

Sincerely
Francis