You might be looking for the Awl Pike from Dragon #331.
While we're on the subject of Dragon stuff, Dragon#338 has the "Shield and Pike Style" feat that would work very well.
As for threatening tiles with a shield, you do indeed threaten tiles adjacent to you while bearing it. However, you will only be able to make attacks of opportunity with weapons that can reach that tile. You would then lose your shield bonus to AC until your next turn unless you have the Improved Shield Bash feat.
Well, there's always Spiked Gauntlets...
Those are both good ideas, especially since using spiked gauntlets should add to my unarmed damage if I go for Improved Unarmed Strike(think Uruk-hai pikemen with that spike on one gauntlet, but add a shield). If I could use the exotic weapon, I might prefer it, mostly because it allows me to use a heavy or tower shield(though I lose out on Str and a half bonus), it fits with my character concept better, and is overall better for 'optimization'. By which of course, I mean that a long spear is a simple weapon yet is better in most if not every way than the awlpike, and there is no martial weapon the feat works with.
My character concept was basically inspired by my long-standing desire to find a way to make a Scout not provoke AoOs and still use his Skirmish bonus to the max, especially if I get Whirling Dervish. What I came up with was him taking martial weapon proficiency: glaive(or guisarme, if I want to trip), and using two Small sized glaives with Oversized Two Weapon Fighting. Now I get reach, they're slashing weapons, and I have two of them; I take a -2 to hit, but I think it could be worth it. Lots of feats to make it work, though.(well, one, since Oversized two weapon fighting would probably be taken anyway).
That, and the Tower Guard, or any historical or fantasy battle where there are soldiers with spears and shields.
Also, character sheet so everyone knows it's mostly done:
Gartens