I'm having enough trouble doing all the things I want to do in my real life. Beyond a forum or two I have no interest whatever in creating and maintaining a virtual life.
Lex
I can't speak for others' use of social networking site, Lex, but I never saw these tools as aids to creating a "virtual life" (whatever that may actually be).
Tools like e-mail & social network sites like Facebook allow one to keep in touch easier with relatives & friends across the state, the country, the planet. I'm in the US with immediate family members scattered from the north to the south, friends scattered from east to west coasts, and distant family, friends, and business contacts & industry peers across the planet.
Phones don't work so well across multiple time-zones, letters are slow, and fax is inconvenient in an age where everyone I know has a cell phone, a computer, and a high-speed connection.
Text, web, & e-mail are fabulous tools that make it easier than ever to stay in touch, strengthen connections, make connections, and remove impediments to business & personal contact.
I'm self-employed and very busy - I have no time for a "virtual life" (again, whatever that is). It's hard enough just to make time to hit sites like these to gather & share info.