Should you want to reach me, you can write to my GMail address (the paranoids among you can get my PGP public key here.) However, if you want to contact me about QuantLib (not about Implementing QuantLib; in that case, write to me directly) you might want to post to one of the QuantLib mailing lists instead. I won't delve into the reasons here; they are covered in detail elsewhere.
Finally, for those wanting to network, my LinkedIn profile is here.