There's a discussion around lines of code (LOC) and code base complexity right now, and I had commented about one the better code bases that I maintain was around 80K LOC, as compared to a much smaller code base that I maintain.  80K was just a guess at the time, but the engineer in me wanted hard numbers.  I downloaded .NET Line Count Utility from CodeProject and pointed to our back end server solution (yeah it takes sln and csproj files as input!).  To my surprise I had guessed the # LOC within 35 lines.  The actual number was 80,035 LOC.  Either I'm good at estimating LOC, or more likely I just got lucky.