My latest article for David Mertz's column XML Matters on IBM's developerWorks site has been up for over a week now, but I'm finally coming up for air long enough to post about it. The title is Pipestreaming Microformats and it is a survey of attempts to apply the Unix pipe metaphor to XML content, then some blue-sky dreaming of how to apply that to microformats.
One thing I mention in the article is that Norm Walsh's SXPipe would be cool to re-implement in Python using lxml. While I was writing the article and in the time since, lxml has been undergoing a flurry of activity the results of which (among other cool things) are that it now has Python eggs for easy install on Windows, OS X, and Linux. So I think it's ready, I just need to find time to spend with that project. If there is interest in such a thing, let me know so I can bump the priority up.