Thanks for the responses, ladies!
Here is julsey723's original knitting pattern.
Here's my attempt at a crochet pattern:
Materials:
Lion Brand Homespun, a little over 1 skein (although I'm a large, if you're a medium I bet you could get by with just 1)
Size P crochet hook
Brooch (I got mine at the Dollar Spot at Target)
Take your neckline and arm measurements - I got out a T-shirt that fits just right, and measured the neckline and arm circumferences. I ended up with 18" at the neck, and 14" around each arm.
Ribbing: You basically fake a 1x1 rib. The gauge is 3 rows = 1 inch, so I ended up with 54 rows = 18 inches. I added one row so the ribs are symmetrical (so you'll want an odd number of rows). The pattern is ch 6, *ch1 and turn, sc into the back loops only,* repeat from the * until you have enough rows.
Body: Ch 1, turn, and sc down the side of the ribbing. You'll end up with 1 stitch less than you had rows. I'm not exactly sure how I picked up the stitches, I just kind of winged it

At the end of the row, ch 3 and turn (ch 3 counts as 1 dc)
The body is divided into 5 parts: left front, left sleeve, back, right sleeve, right front. To figure out where your increases go, divide the number of stitches by 6. I ended up with 54 stitches/6 = 9 (you can fudge it a bit if you don't have a multiple of 6). So I got 9 stitches for each section, and 18 in the back. I put the increases away from the sleeves, so for my first row, I had:
8 dc (including the turning ch 3), increase, 9 dc, increase, 16 dc, increase, 9 dc, increase, 8 dc. Ch 3 and turn. *The increase is dc-ch2-dc.*
For each subsequent row, just dc even until you get to the increase from the previous row. Make sure you dc into the dc's that make up the sides of the increase (this makes your increase for the new row), and dc-ch2-dc into the ch2 space. So you'll get something like this:
dc dc dc dc dc ch ch dc dc dc dc dc dc
dc dc dc dc ch ch dc dc dc dc
Continue until the increases reach around your arm. If you measure from the first increase to the second, it should be about your arm circumference, although I ended up having to do one more row and then close up an extra row on the arm (I'll explain that in a minute). You can use scrap yarn and tie the increases together to try it on and see if it fits.
Once you have enough rows, start your next row, but when you get to the first increase dc it together with the second increase. Congratulations, you just made a sleeve! Continue across the back, then dc the next two increases together, and finish up across the front. After that, just do enough rows on the body (dc even, no more increases) until the body is as long as you want it to be.
Going back to the sleeves, take the two stitches on either side of the increases and dc them together (if you added an extra row like I did earlier, otherwise skip that), then dc around the sleeve. You can add more rows if you want the sleeve to be longer.
And that's it! I swear it's much simpler than I just made it sound. julsey723's pattern calls for ribbing at the sleeves and bottom as well, but I think this version hangs better without them, and besides the ribbing is a pain

I washed mine this morning, and it came out of the dryer so soft! I'm going to make another one in Baroque (a nice light purple with a bit of pink).