Long Distance Communications
Only 5 years ago, this kind of communication was unheard of. I can text my sweetie in the U.S. and she can text back (as long as she's got load). It's not quite real time, but it's a lot more convenient that e-mailing... which requires a computer, internet access, etc.
Cellphones have probably changed the lives of many OFWs in like manner. Although I'm aware of many other options for communicating with your loved ones back in the Philippines.
There are call cards (pay $10 and get x minutes of talk time). There are those Internet Phone thingies (requiring Internet access - even if just in an internet cafe). There's those communicator thingies that can access e-mail. There's the Instant Messaging option...
All to keep in touch and communicate better, and make the world a little smaller.