"txt WHAM 2 555999 411" means in texting language "send a text message to WHAM at 555999 for information"
At the recent NAR mid-year meetings in Washington I saw several companes that were in the text messaging business geared towards real estate.
www.WHAMMobile.com works like this.
For a show special price of $99.00, good through the end of May, you get a text code number for a listing and a website where you can upload property photos, text descriptions, and most importantly, your contact information.

You then put a sign rider on your listing with a special text code number. The potential buyer in front of the listing texts a code you assign to that listing, i.e. MLS1000 and a text number.

Immediately they get a return text message with photos and information about that listing ALONG WITH your contact information.
The system also captures their phone number so you can follow up with them.
Give it a shot, text WHAM to 555999 and see how fast it is.
Not only is this a way to sell your own listing but it could become part of a powerful seller presentation as a reason why they should hire you to sell their house.
I talked with a nice guy named Seth at www.WHAMMobile, 866-942-6839 who said he would give any interested ARers the NAR show price if you mention my name, so if youre interested tell Seth that Jim sent you.
Texting is now.