commit: 6b2ca8a - #414 (2014-03-05 12:54:44 -0500)
Yep, this should be a must read for anyone who's doing SEO and working with a spreadsheet (and anyone who's doing SEO should be working with a spreadsheet, eh?).
We built an Excel a few years ago that we used to Concantenate prefixes and suffixes to root keywords for both SEO and PPC keyword research. We then built a PHP app that does it faster and easier. Check out this little app and feel free to use it: http://www.purposeadvertising.com/concatenate.php?act=go