Word of the day: Climacteric!

So, this probably isn't news to some of you, but I just learned that "climacteric" fruit is fruit that will ripen once its off the tree.  YAY!  This is awesome, because I've been having trouble finding ripe fruit.  I always knew bananas did this, but wasn't quite sure about anything else.  Apparently, the following fruits are all climacteric:

kiwi, cherimoya, atemoya, soursop, sugar apple, breadfruit, jakfruit, pawpaw, black sapote, persimmon, durian, fig, tomato, mango, (pear and apple I'm not sure?), sapodilla, banana, passionfruit, avocado, canistel, mamey sapote, peach, apricot, plum, guava, and canteloupe!

Unfortuently, citrus is not on this list.  BOO! :-/  I love my fresh OJ...how unripe do you think most grocery store oranges are?  I bought some online once, and they were MUCH softer and sweeter than the navels in the store here, but they were temple oranges, so its not really a fair comparison.  I always squeeze them to check how soft they are, and usually can find some sort of soft ones...but they aren't as SWEET as I'd like.  I would hate to skip my OJ tho!!

Also, what do you think of buying imported fruits?  Pretty much all the melons and tropical fruits that are around here (unless its the middle of summer) are from a different country.  Are they irriadiated if they're not organic?