First of all I'd like to thank you all for your sympathy and understanding. Your generosity and empathy are inspiring, and more than I could have ever asked for, short of my pipe back.
Tracing back my steps, and carefully examining my desk space revealed several other oddities, such as slightly opened cabinets, a missing monitor converter. Furthermore several colleagues also reported missing artifacts within 24 hours of my pipe gone missing.
So I set a trap.
I set out a smartphone that belongs to the office on a desk that had not yet been raided, but in close proximity to those that had been. Coincidentally it just so happens that I hacked the living hell out of the phone.
I assumed that the person is technologically literate if he works here, so I even made one of the security measures just evident enough to make the culprit think they managed to neutralize what measures might be in place. He'd be dead wrong and a walking Beacon transmitting audio, video and geolocation, until he completely reinstalled an operating system, and I made that very hard to do.
Now I'm just waiting for it to walk away.
I must state that I'm not out to ruin any lives, and believe in second chances, but I want my pipe back, and find the hunt therapeutic. Also got to learn quite abit about mobile device vulnerabilities which was both fun and frightening.
I will update if there are any developments.
Thank you again for your generosity. Especially fnord, you're an amazing person and I am humbled.