Tagging WMA's:
Well I've tried numerous tagging applications, but some were trial only - I am looking for Open Source, because let's face it - we all love the free stuff. The only tagging tool for MP3 & WMA that I found was Entagged - TagEditor. It worked ok, but it was still buggy, abd every now and then it got fussy with MP3's for no reason.
However, if you are a Vista user this is the fastest and easiest method of tagging - just by opening the music folder and going through all of your artists and selecting an entire set of songs from one album at once and fix the genre. Sorry if this is a "no duh" tip, but this is the best way to fix MP3 & WMA tags, and check the album art too (disply in tile mode). Here's a screenshot:
http://tedborel.com/zune/batch-tag.jpg
Video:
Tagging WMV
I use dSharpie to tag all of my WMV files. It works great - again Open Source. I'm not sure where the download link is but Google it or try this forum link.
Commercial skipping - if you have Media Center and record non-HD TV content you will love Life Extender (Open Source) www.LifeExtender.com It runs silently in the background and starts to remove commercials as soon as the file is finished recording. It saves me a ton of transcode time for the Zune!