Does anyone know if I could order the Sidekick add-on plan for $20 - unlimitted text messages, browsing, email, etc. - and just use that in my Treo? Does anyone do this? Would Tmo know that it was being used on my Treo?

Also, I'm almost out of my ATT contract (yay!) but unfortunately I missed this Tmo plan for 1000 minutes, and free Friday Sat and Sunday. Does anyone know about any promos coming up? Is there 7 PM evenings on the horizon like Sprint has?

Any advice or info would be appreciated...Thanks!!