Text messaging services via your mobile phone (a.k.a. SMS services) were a pretty big hit once they became interoperable among different carriers' networks.Sometimes, though, you just need to get word to someone but aren't at liberty to use two hands to type a text message. And you don't really have the time for a full-blown phone conversation (read: you want to leave a bare-bones voice message that will get picked up ASAP, but you're secretly praying the recipient doesn't answer the phone).Borne of this need is yet another twist on a communication service: the Rapid Message Service (RMS) from HeyAnita, which is sort of like text messaging without the text. In fact, it's a "recorded voice-messaging" service that's also like voice mail, except the phone doesn't ring, the caller doesn't wait through a recording to leave a voice message, and just a slight beep or text message alerts the recipient that there's a voice message waiting.Anyone with a mobile phone that is text-message-capable (90% of mobile phones in use, according to HeyAnita) can reportedly send and receive RMS messages across any kind of 2G, 2.5G and 3G mobile network regardless of mobile handset type and without having to download any special software.Instead, the service runs on server-based software. Subscribers self-provision themselves when they receive messages and populate their own address books.This is not a bad option for those who just can't master typing messages on a cell phone keypad - or for those in situations where it would be dangerous to do so. Also, sometimes it might be too late to ring someone's cell phone directly, but you might want to leave a message while you're thinking of it so that the recipient gets it first thing in the morning.Currently, HeyAnita is offering a free trial of RMS to whomever would like to try it - visit http:\/\/rms.heyanita.com if interested - while the company works out deals and service agreements with various providers. Possibly among them are existing customers Sprint, Verizon Wireless and Net2Phone, which offer services based on the company's other enhanced mobile messaging products.