I ordered my Tokina-11-16MM today off amazon, I'm not sure if it'll work with my 5D, I didn't check when I bought it, it'll be shame if it'll only work with my 7D.
Next on my list of lenses is the 70-200 2.8, looks fairly cheap on B&H or I could pick it up used on ebay for 900ish.
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Canon 5D | 50mm 1.4 | 24-70 2.8 | 16-35 2.8 | 85mm 1.4 | 24-105 f4 | 70-200 2.8