I modified the products template and added a language variable to display "Priced From" instead of "Our Price" if the product has options.
It's not really a great solution, I was looking for the same thing you were, but I kept digging deeper and deeper and I was going to end up modifying files I didn't want to lose on the next upgrade process...
Here's my code: ( search for $lng.lbl_our_price for placement)
Code:
{* CAIMEN MOD - Show "Priced From" if variants are there *}
{if $active_modules.Product_Options ne ""}{$lng.lbl_priced_from}{else}{$lng.lbl_our_price}{/if}
{* /CAIMEN MOD *}
I also added it in products_t.tpl for the featured items...