BITS is the Background Intelligent Transfer Service. I’ve started a series of posts on using the PowerShell BITS cmdlets on my IT Knowledge Exchange blog
1 http://itknowledgeexchange.techtarget.com/powershell/bits/
2 http://itknowledgeexchange.techtarget.com/powershell/download-multiple-files-by-bits/
3 http://itknowledgeexchange.techtarget.com/powershell/upload-through-bits/
More to follow