Yeah, Nick, I sure can help with that.
rawfamily.com is the Barefoot Runners Society of green smoothie concoctions, the go-to place for the best information, and Victoria Boutenko is the Barefoot Ken Bob of the green smoothie. She actually invented the green smoothie. Don't let the fact that she is a completely raw-food proponent throw you off; you can just go there to find tons of recipes for various smoothies. Once you've done a few for yourself, you'll get adventurous and start making your own concoctions.
A powerful blender is the key, really. I was making a smoothie a couple of months back and just destroyed our Oster, so I did a lot of research on blenders. We ended up getting a BlendTec from Costco, and, while not cheap by any means, was worth every penny, since I use it every single day. Sounds like your wife's blender will work, though, so have at it. It's important that you use about 16-20oz of water or some other liquid (I like coconut water), and keep your recipes fairly simple, at least at first. You can go heavier on the fruit in the beginning if you can't tolerate veggies, but, in time, you may find, as I have, that I go heavier and heavier on the greens because I like that "green" taste. Kale, collards, spinach, romaine, chard -- you name it, it's all good. Go for about a cup of greens and a cup and a half of fruit with your liquid base. Berries are great, and frozen bananas are a must. Fresh stuff goes in first always, with frozen stuff on the top.
Do check out rawfamily.com for lots of recipes. They even have an iPhone app that you can use when you're shopping for greens at the store. I've found green smoothies to be a real game-changer for me, great for pre-long runs as well as post-run recoveries.