I had the unpleasant surprise to find out that my domain is for sale at SEDO. I'm the first owner of the domain, with a successful website, and the domain is registered until December 2010... I never thought about selling it, and I'm not affiliated with SEDO in anyway...
Please let me know your opinion... Do I need to worry about this?
Are you sure it is your domain and not an internationalised domain with similar looking characters or your domain with a 1 replacing an L or something similar.
You have a website on this domain up and running right now and just found out it is listed at sedo for sale. Intresting, your not inclined to sell but I would assume it is someone trying to scam it.
Contact sedo about this they are a good company and will take it down if your the registerd owner and request it.
Are you absolutely sure the domain hasn't expired? If it has someone else may have grabbed it and put it on Sedo until a new website is ready for it. Have you checked the whois to make sure that you are still the registrant?