I know there can be more than one keyword per icon - it's not a bad idea in the slightest, but not something I'm fond of personally because I don't like "clutter" and I use the custom icons page, so if things don't line up right/run more than one line/TOO MUCH TEXT it bugs me like you wouldn't believe. Being big on aesthetics always complicates matters on my end.

Having an email copy of icons and keywords sounds awesome tho even if it's not coming right away.