Cyber love? What's it all about?

Daily I read blogs and posts about people professing to have had their hearts broken my unscrupulous characters or occasionally by the supposed love of their life – without ever physically having met the person - it really does beg the question, Can you fall in love with a Cyber partner? And how do you define a cyber boyfriend/girlfriend – are there rules or parameters?
Perhaps it’s my cynical nature but the idea seems impossible to me, surely the nearest one comes is perhaps falling in lust with a perception or creating a persona to fill a void . But actual love – that’s a tough one, now I know love is blind but how do you feel chemistry over the interweb?
Don’t get me wrong, I’m not doubting the validity of the emotion just the reasons behind it – I’ve a couple of people on here that I feel I have become close to, for different reasons. There’s one with whom a romantic connection with would be no doubt pleasant and I think I could easily fall in lust, if not love and yes be hurt by them if the feeling was not reciprocated. However, actually seeing them face to face would be a very necessary part of the journey.
Another purely fills a need – I don’t know what he looks like, but he can talk the talk with the sexiest damn accent – and for some unknown reason I trust him totally and that makes things very interesting ;-) I have no intention of actually meeting him and maybe this is why I can be so open with him.
Finally there’s a guy that if not Mr Right, could well be the right guy for right now … but we’ll see.
But a cyber partner? Still think I need some convincing …. What’s your cyber story?