The writeup looks good, but I'm going to beg to differ on the bracers of speed (anklets in his case) grangting a higher (Hero) SPD.
First, I'd set his SPD based on the setting. I'd say he's easily in the 5 or 6 range from his training and experience, which should be around the maximum attainable by an elfy type in Faerun. It's a fairly high-powered, epic setting.
Now, for the bracers... did they really give the original bearer (forgot name) a huge advantage? Mostly, they let him go first. I'd buy that ability as big pile of Lightning Reflexes, maybe +10 or +15. For wrist-wear, I might say a +1 SPD, with two custom limitations: First, only for actions involving the hands. (In the novels, putting them on the hands of the feet matter, so I'm assuming a localized effect. In 3E, this wouldn't necessarily be the case for the item.) Second, only up to SPD 5.
What happens when Drizz't gets them? He finds they really don't help him on his wrists, and in fact just hinder him as a distraction. Sure, the lightning reflexes is handy, but when you have a whole body SPD at or over what the Bracers grant (which is why I suggested the 5 or 6 SPD above, as he's clearly beyond being able to be helped by the bracers in the novel)? So, he sticks them on his feet, which lets his feet move MUCH faster. For footwear, I'd just give him extra Running, and maybe the Lightning Reflexes at the one point level for a single action, in this case for movement. I wouldn't give any limited SPD for using them as footwear, b/c it doesn't really model much, and he's beyond the SPD/extra attack enhancement effect being useful anyway.
Also, by the time he's got his bracers, he's lost most of his Drow talents, hasn't he? The only trick I recall him using later in the series was the globe of darkness effect. An I think he was just starting to pick up some ranger abilities from his association with Meilieki (sp?). I seem to recall some affinity for animals effect (other than his usual bear-toleration from the beginning) at a later point in the books, but it's fuzzy.
