I actually did the same thing a few years ago - skidded on some ice and hit the pavement. The card drove fine, so I thought nothing of it, until I drove on the motorway and the steering wheel started vibrating at speeds over 60 mph ish - indicating that the wheel needed re-balancing. I thought I must have knocked some of the weights off, that are used to balance the wheel, when I collided with the kerb.
I took it into a local Kwik Fit and it turned out the wheel was actually buckled slightly .... £50 for a second hand alloy (not from Kwik Fit).
If it drives fine, you should be ok - just hope you haven't buckled your wheel though :(