Tactical Responses
Thanks all, for your advice.
Some points I should clarify, as there are some Unearthed Arcana rules I talked my GM into using.
The character uses a variant Fighting Style from page 52 of the Unearthed Arcana book: Sleeping Tiger.
At 1st level the character recieves Weapon Finesse as a monk feat. At 2nd, Improved Initiative. At 6th, Improved Sunder. (This may make me very unpopular). At 6th level, the character gets a d6 sneak attack bonus if they use a light melee weapon, as long as he has the Power Attack Feat and 9 ranks of Hide.
Thus the focus on hiding

My list of feats counts the style feats as regular feats: it's an artifact of my character generator.
Skills
Good point on the diminishing returns with Tumble...I'm a little less sure about the Hide and Move Silently: I wanted to keep the ninja aspect of disappearing in a puff of smoke, so the -10 penalty to Hide with a distraction is going to be a good friend of mine.
I also wanted to be able to move not just quietly, but quickly, and there's a -5 penalty there as well. Though as a monk, half my base movement can be surprisingly quick.
Abilities
With the style, and my party function of scouting, I elected to keep the dex high, but still have enough strength to get Power Attack. Thus the arrangement of Strength and Dex.
Feats
Well, this was challenging and where I'm particularly glad to have help. I like the sneak attack bonus ability of the style, and I think I'm going to stick with that. The Weapon Focus was an attempt to maximize my hitting potential, so I could turn it into power attack damage. Run was meant to increase my climbing and silent movement speed as well as my ground speed, but upon observation, it does something different than I thought it does. So I've been wondering what feat I could replace it with that is available to a first level monk.
Cleave is a darn good idea -- big thanks for the cinematic thought. Other thoughts include Lightning Reflexes, to get the most out of that evasion ability, Blooded (+2 Spot/+2 Initiative), to see better and control the flow of combat more effectively, Improved Overbear (on the theory that a prone opponent is very vulnerable to Power Attack stomping) and perhaps Blindfighting (combine with smokesticks to gain physical protection...but there may be some issues with that).
Any feedback appreciated, as always.