Following up on my other posts about new unix tools, I've uploaded the moreutils package to Incoming and alioth. Currently it includes isutf8, sponge, vidir, ts (timestamps stdout) and vipe (discussed below). Hopefully this collection will grow to include other useful unix tools no-one thought to write 30 years ago.
vipe is my new personal best at writing a generic unix tool. It allows you to edit the contents of a pipe in a text editor. For example:
find foo -type f | vipe | xargs rm
Sorta handy as a way to make ad-hoc changes to data in a pipeline, or even just to examine it.