We just added recent incoming SMS messages to the dashboard. These are typically replies from patients to your SMS reminders.
If you're a practitioner, it will just show messages for your appointments. If you're not, then you'll see all for the account.
There's also a link at the bottom to view all incoming communications, not just the recent ones.
It looks like this...
We still plan to give you more options on being notified when they come in (currently you can only have them forwarded to your phone). This will be in a future improvement.