very nice, a few comments <EDIT> ok, so the few turned out to be more than a few! lol </EDIT>:
your sheet seems to assume that the character will only have one class. multiclassing is a little difficult to record. also, the thickness of your text box borders makes for a bit of a clunky look. thinner borders would give it a cleaner more elegant look, at least in my opinion.
i really like the splitting of the combat and skill info, although some skill are still sueful in combat, putting additional spaces to copy them, (e.g. movement skills like tumble and jump; combat maneuver skills like bluff, sense motive and intimidate) might be worth a look.
also, room for more than one type of ammunition might be useful (regular and special arrows for instance). rather than putting an entry after every weapon, two entires after two might be worth considering.
you have a LOT of space for languages. most characters will only have a few, and those with several can always put more than one per line. using some of that space to add more lines for Knowledge, craft, perform and/or profession skills might be a more efficient use of space.
the shading on the spell pages seems a little too light i barely noticed it on the pdf, and it's not really apparent printed out either, which defeats its purpose. make it a little darker. also, thinning the borders on these tables will go a long way toward keeping the sheet neat and clean looking,
especially when the writing goes in. using different sized borders would also help to more clearly distinguish the columns. (so would spacing the actual tables, rather than using a thich border.)
finally, if you're going to sell it, then you might want to make it form fillable and auto calculating. all in all i really like the layout.
~NegZ
<EDIT>
i find that the best way to record HPs is to have a small space for max HPs and lots of room for its ever dwindling current value

in the case of your sheet a small box in the upper left corner would do nicely. it's a lot easier on the sheet if you don't have to erase one area everytime you take a hit.
</EDIT>