I'm planning to implement Opt-In Marketing not by using e-mail newsletter but using SMS or MMS services. Do everyone think that this could be implemented? How about the cost? Is't wiseable to implement or not?
Thats do-able and several big websites are already doing this. However, what ever you will be promoting should be sent to the subscribers regularly by SMS/MMS alerts to benefit from the whole thing. I am not sure about the costs involved.
Ok.. it look good enough. My telco's have given me an opportunities to send at least 100 SMS free every week or so. I hope that I can used it for good.
I think using text messaging for marketing might be effective for a specific niche/local market but it has not wider scope, you can look for podcasting if you want to capture a big market.
I do my own SMS marketing using Asterisk free PBX.... I can help you get started if you would like. PM me, and I'll send you more details on how im running mine. Currently the only overhead is with my SMS provider, the rest was free!