How do I *receive* SMS messages on my computer/server?

[Parand]

I'd like to allow people to interact with my site using SMS - they'd send an SMS message with a command to my number and my site would respond.

Getting a short-code is quite expensive. I've tried the twitter API and that works fairly well, but users have to direct message me, which is a bit complicated. There seem to be lots of SMS gateways for sending messages, but not receiving.

Are there any other alternatives that would allow me to have a simple number people can text to, and I'd end up with the messages accessible via an API to my server?

[hk]

i guess you have sprint or verizon, you just sign on your phones e-mail screen, and with options, have all messages forwarded to another account. *2 will get you to customer service w/o a fee regarding min. used