SMS in Java

Our web site will be used by multiple individuals as well as small business owners. we like to offer them the ability to send / receive text messages individually as well as in bulk. For this we have chosen: smslib from apache. It should read and write to a mysql database. You are free you create database / tables with coordination) Keep it generic and re-usable. Let us know what experience you have with gsm modem or cell phone as well as bulk providers. Any do's or don'ts etc.