IS IT POSSIBLE TO SET YOUR PHONE TO ANNOUNCE THE CALLER WHEN IT RINGS ON THE LG REVOLUTION. WE HAVE HAD SEVERAL OTHER LG PHONE AND THEY DO.
Try seeing if it where a number of pther devices have it by going to home screen: Applications>Voice Commands>Menu>Settings>Prompts>Mode>Voice Tones Only.
If that option isnt present then you can try
Full Screen Caller ID has this option from https://market.android.com/details?id=com.androminigsm.fsci&feature=search_result