Mark, I can demo HF email with Winmor, if you want to see it. I wasn't aware of texting capability via HF, but am not surprised. We aren't talking large attachments. Text and very small files only, as the connection is slow. To do large attachments, a hardware investment of around $1500, over and above the radio cost is needed. DaveK has that setup. Field Day with the OAUSA bunch would be good to check it out.
I have a post or two in my build thread about my cell phone booster, how to properly install one, and what to expect.