I'm not sure I'd ever buy an Insanus, but they sure are fun to look at.
http://cgi.ebay.com/Ser-Jacopo-R1-INSANUS-3-Briar-Pipe-New-Pipe-/170630885160?pt=LH_DefaultDomain_0&hash=item27ba64af28
Ser Jacopo has a process to drill curved airways. I have no idea how they do it, they keep it under pretty tight wraps. This pipe is actually fairly tame for the Insanus series, some of them are very strange.
Very different to say the least! As for the the drilling??... looks to me like a standard drill bit could drill in a straight line from one corner of the stem mortise to one corner of the bowl...