Nick Christenson designed and implemented Internet systems, including email, for EarthLink Network, Inc., during its period of rapid growth. He also worked for Sendmail, Inc., as a senior software engineer and senior technical consultant. Nick is currently a senior analyst for Sistina Software. He has given talks at the USENIX Symposium on Internet Technologies and Systems and at the O'Reilly Open Source Conference. He has written articles for ;login:, the Erlang/OTP User Conference, and USENIX LISA.