Beta 4 of TV Toolbox for Windows Vista Media Center has been released recently on the MCEDev.com site.  This beta includes bug fixes and functional changes that address issues reported by customers who used the first 3 beta versions.  Here are some links to additional information about TV Toolbox:

• Beta 4 announcement email, including a list of changes and bug fixes since the previous beta - http://www.mcedev.com/News.aspx?id=354e7e66-6698-4dba-8c3f-0d3cb9b21178
• Beta 4 download location - http://www.mcedev.com/Download.aspx?id=bea709c9-0a56-41b7-8358-5092ea8357ce 
• Original TV Toolbox product announcement (including feature list and screenshots) - http://www.mcedev.com/News.aspx?id=b88920c9-57a4-44fc-8feb-78c18b596fa8

If you are interested in editing and converting your recorded TV shows to other formats in Windows Vista Media Center, I encourage you to check out TV Toolbox.