My sis met her boyfriend of 2 or 3 years off the internet... she's been living with him for at least 1.5 years. Though I guess that's supposed to increase their chance of divorce
My girlfriend's sister (no, i met her at a party, in person) is getting married to her fiancee whom she met online.
It's not a bad thing, though it would suck to talk to someone on the internet for a year and then meet them and have it turn out that you the two of you have no physical chemistry.