That sounds interesting Rebecca. Let me know if you like it.
There is also another feature with ping.fm where you can use your email and phone to update.
Here is what ping.fm says:
"You can post messages from your posting e-mail address simply by sending a standard e-mail from your computer or mobile phone. If your wireless provider supports SMS to e-mail, that will also work.
You can also attach pictures to your e-mail and we will host and link them in your update.
Keep your posting e-mail address secret. If someone got ahold of it, they could post messages to your account. "
Another option to try out