They also send e-mails too. Nothing like finding out at 3:30 a.m. your 9 a.m. SYD-MEL flight turned into an afternoon SYD-BNE, then BNE-MEL flight (but at least I made it to Melbourne!)If you haven't already, you may wish to subscribe to SMS flight status alerts as that was how I recently found out a flight (which I had helped book for a couple I know) was cancelled when they were on their way to the airport:
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The couple I helped book a flight for hadn't yet received an email about the last minute cancellation and I found out before them through the SMS flight status alerts...They also send e-mails too.