Thank you so much bladerunner and aislynn, your suggestions have been a huge help.
My shoulder will be bandaged heavily for the first few weeks, and for eight weeks, I'll be in a shoulder immobilizer, which is basically a mega-sling. It's got the little strap and pocket for the arm, like a regular sling, but then there's also a big strap that goes around my body to make sure there is no movement at all. It'll be this, or a variation of it: http://www.hely-weber.com/products/501M.jpg
. Cute, no? [/sarcasm]
Ponchos are a great idea, as are the sleeveless, button front sundresses. I live in Oklahoma, where it's really hot during the day, but can get a bit chilly at night, so there'll be a lot of use out of both of those. They're pretty easy to make, but I'll bet I can also find a few decent items at the local vintage shops-- YAY! for the poncho craze of a few years ago!
One shouldered tops look like they'd be really easy, and that they'd work beautifully! Perfect!
I love the idea of wrap tops, but I'd need to make very sure that once they are closed, they stay closed-- I've had "wardrobe malfunctions" with wrap tops before, and don't think retying hastily so no one gets an eyeful will be an easy task! On the other hand, maybe the band from the immobilizer will help me out on that one... just thinking out loud.
I really like the statement that I'll never know what mood I'll be in. I hold nothing against sweats and hoodies, but the thought of wearing nothing but for months is depressing, and besides... they are hardly appropriate for every occasion.
Finally, thanks for the suggestion about my armoire of doom, which I suppose I REALLY need to fix. It's an old armoire, packed with approximately six bajillion more items than it was meant to hold. (Think Jenga, only with clothing) I think I'll start on that this weekend!