I just watched Slurp come round and spider my IP cloaked site. However, even though I could tell it was Slurp, the User Agent was Mozilla 5.0. Luckily, I already had the IP. If anyone is interest however, this is the bugger to look out for:
216.35.116.50 - "Mozzilla/5.0" (Slurp/Inktomi - [inktomi.com...]