Yes, thanks! I was originally searching for "c++ pv", which led to lots of c++ examples implementing "present value" calculators, or snippets of code using "pv" as a variable name. I later tried "pv tarball" (figuring that a useful command-line utility would probably be downloadable that way), which led me to http://www.catonmat.net/blog/unix-utilities-pipe-viewer/ and so to http://www.ivarch.com/programs/pv.shtml.