Okay, I just glanced at the wikipedia entry for Harvest Moon DS Cute.
... PLEASE, somebody, find out if the US version includes 'best friends' you can have babies with? I HAVE TO KNOW!
edit: Unfortunately what little I can find so far suggests that they removed it, at least for the US. Bah. Despite my boredom with Rune Factory, I could not resist buying something that let you marry adorable girls together. :)