May be it’s not the right place to make commericals, but when the offered service has a good quality, why not?
I’m using the SMS web service from www.ipipi.com. This service is an “intelligent” mail to SMS gateway. You can send your SMS to an email address and they will forward it to mobiles, based on different rules you can define.
You have to buy SMS credits (10, 20, 100 … ), register some mobiles and define rules to forward the SMS to the right mobile. Define good rules to avoid spam ! Until now I never had any problem. It’s true that the mail address I use is not a trivial one !
I hope it will help you!