I purchased approximately 75 (dotmobi) mobi domains last year and they are getting ready to expire in a few weeks. I’m not sure what to do! Is the mobi domain expected to pick up in popularity here in the US? How about in other countries?

Are there any dotmobi experts out there who have followed the success of the mobi domain and can offer an opinion on whether I should try to sell my domains, renew them, or just let them expire??? Thank you for any guidance or responses!