using SMS as push email

Ever since Research In Motion (RIM) announced their Blackberry with Push mail support I wondered, if I should use push mail, too. Now I came to the conclusion, that SMS is even better than push email for me. The biggest point in using SMS as a push email medium is, that it has to be short, normally less than 160 characters. So if anybody wants to send me a message, that reaches me immediately, they have to keep the information short and concise.