Outside of mechanicals the closest to a standard layout tenkeyless is probably the IBM Space Saver II (http://davidbau.com/archives/2005/05/21/worlds_best_computer_keyboard.html). The only deviation is that the PrntScrn/Numlk/Pause and Ins/Del/etc clusters are bumped down so that they're directly above the arrow keys.
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(http://www.clickykeyboard.com/2006/sep012006/sep012006-004.jpg)
I like the layout of the IBM Space Saver II. Keys aren't the best, not the worse either. The trackpoint is a bit plus for me. There are certainly worse keyboards for moderate use where you want a compact keyboard.