Posting via SMS is really posting via email. The SMS message passes through
an email gateway via the network service provider. This email is then picked
up by Radio Userland and posted. The advantage of this is that any device
capable of sending an email can post to a mobile blog. How you actually do
it is no longer important providing at some point the message gets converted
to an internet email. Sending email via a PC has the advantage of being able
to attach a picture to the post. This would also be possible if you had an
MMS picture phone. There are now multiple options for posting from mobile
and handheld devices.