Hey there lawomous, I checked out that addon and unfortunately it changes the look of the default frame too much for me. However I did find another addon called TargetPercent (http://www.curse.com/addons/wow/targetpercent)
Maybe I can edit the LUA file to remove the percent part of the addon.
Also i need to check to make sure this applies to boss frames and arena frames as well as focus, target and player frames.
I was wondering a /run script or option on default UI to change the health text from 100,000 format to 100k as well as boss HP in raids with a M abbreviation etc.
I'm using bits and pieces of CTMod (www.ctmod.net) and one of the things I like about it is that it allows you to make some changes to the default unitframes without changing the looks. I'm pretty sure it does the formatting you're looking for, as well as being able to add percentages. Download the full package and disable any of the mods you don't want to use (I think CT_Core and CT_UnitFrames will be enough for what you want).