I like this ID. It has a lot of built-in combo potential.
Parasites and Core Anarch suite come to mind first, yes, along with support of some Datasuckers should prove viable enough, even against stronger, meaner ICE. But this obviously doesn't cut it - that's what you see at the first glance. Let's look again.
Realize this: if you happen to discard a card to your core ID ability, you can then immediately use Clone Chips to effectively install a program from your grip at instant speed. It is a thing Shapers excel at, but then, Shapers don't have in-faction Parasites, yes?
Wanna make money? Consider extending your circle of influence at Exclusive Parties - after you feed several of them to your ID, of course.
What else is there to say? With Null, you don't have to worry about having to include multiple copies of crucial cards just for the sake of consistency. With such an ability, no card is really useless, so additional copies of, say, a console, won't be much of a hassle. And this, unto itself, is an awesome trait.
I expect Null to see a lot of play very soon. He involves a lot of making decisions on the spot - would I rather use this card or trash it to weaken some ICE? - but if you play your cards right (heh), the result is certainly satisfying. Sure, he won't give us Whizzard back - there's a lot more thought involved when going as Null, which also makes him an ID much more elegant to run - but his sole destructive power is comparable, even if not as direct as Whizz's.