Sprint's had text-to-speech services on devices like the Samsung Epic 4G for quite some time, and now, looking to build up on that, the company's introducing its My Wireless STS feature. The new speech-to-speech service aims to help people with speech disabilities by giving them access to an operator-assisted line every day of the week and all year round. Folks wanting to use the My Wireless STS will have to dial *787 from their device, after which a Now Network rep will start a call and repeat every spoken word -- or ones