I've written a new, short, totally free eBook that explains how to build multi-sectional HTML reports in Windows PowerShell. This is something I'll be building on in the future, as I have time, to add additional formatting capabilities, and even interactivity. But what's there now should be a great start! Check it out and let me know what you think.
It's on the free ebook list at http://powershell.org/ebooks.