I found two apps a while ago which have been pretty reliable. One is Backup to Gmail [1] for the text messages. The other one is called Calltrack for the calend

I found two apps a while ago which have been pretty reliable. One is Backup to Gmail [1] for the text messages. The other one is called Calltrack for the calendar things. It's nice to have it all integrated and searchable inside Gmail and Google Calendar. [1] Just checked the Play store, and I think it's called SMS Backup+ now. There are a few alternatives too...