A Question of Memory, another frikkin commlink question Options

[WiredWeasel]

I got a question regarding commlinks and their usage, why not...everyone else does, right?

Okay, and keep in mind, I'm still fairly a newb trying to get an understanding of all this. Wasabi mentioned in what I will refer to as the Flametastic thread, for simplification, The unlimited storage in SR4 and IC not fragging one's commlink because it's actually fragging a network. Maybe I read that wrong, Wasabi, if so, sorry bout that.
I'm confused. So, Commlinks don't have memory or storage limitations? Thought they did...gotta store the paydata somewhere, right?
Also if the IC doesn't frag your commlink, what exactly happens when you're targeted? BlackIC, is obvious, physical damage. And VR? We all now how much dumpshock can mess up a hacker/decker's day. (Yes I still like calling them deckers, hacker seems too mundane and "real present day" Decker makes 'em sound special) But what if you're hacking from AR and get IC'd? Nothing happen? You just shrug and say "Well crap...guess I gotta try again" That seems rather...anticlimactic...

So in summation, questions are:
Do commlinks really have unlimited memory, and how's that work?
And what happens when you get IC'd?

Direct answers or general guidance to where to find it myself greatly appreciated.