Some fuel line might not be entirely happy with it, but does it still have 20 year old fuel line on? If it does, it's probably due a change anyway.
It could possibly attack an o-ring/seal in a fuel tap in a similar way but again, I'd imagine someone got fed up of the anaemic dribble the standard taps produce and did something about it by now. If they haven't, throwing the flat rubber washer that seals (and partially blocks) the sediment bowl in the bin and replacing it with a viton o-ring is something you should do regardless of the fuel type. Or do similar with the whole tap. I've found OMG taps are effective, inexpensive and flow at least double the fuel a standard one does.
Other than that, it's probably best not to leave the tank sitting idly full of E10 for a protracted period because it has a tendancy to attract water and split into layers of fuel and manky water/alcohol mix, potentially rusting out the bottom of fuel tanks. So if you're laying it up for a period, probably best to drain the tank.
Running-wise, a standard bullet wont care. If it's been tuned to the point you need to use high octane fuel, you were probably already using super and in that case, the ethanol content isn't the issue anyway.