Shouldn't take too long to brute force the keys with several pooled ASICs.
Here's a rough ballpark example, assuming:
Your several ASICs have a combined 500 GH/s
You'd have to make 2^96 possible guesses to get Satoshi's address
(2^96 hashes) / (500,000,000,000 hash/s) = 1.58456325×10^17 seconds
That's about 5 billion years.