Pictures are blury/shaky

[TerminatorLaser]

Right now I have a Cannon Powershot. I went to comic con and a lot of my pictures didn't turn out that great. They would turn out blury because the subject would be moving or because I would have to zoom in.

If I got a new camera, what features would I look for that would prevent the problems I am having?

[Frog]

What is comic con? Is it a nightclub type place?

If you were trying to take pics in a nightclub type atmosphere you will need to look for something with a wide aperture, f/2.8, or more and good high iso performance that will not make the pics too grainy/noisy.
Which powershot do you have now?

[SmartWombat]

For indoor shots in a conference, like Comicon or Worldcon, you're usually dealing with lights that are dim even for people in the conference rooms, and little better out in the concourse areas.

So you would need to look for good high ISO performance to take good pictures in low light.
That doesn't come cheap, because it needs a larger image sensor than a small compact camera.

A fairly good starting point is the micro 4/3 system, either Olympus (my favourite) or Panasonic. I've had good results in dim light with the E-P1 and it's likely the physically smaller E-PL1 is going to be as good.

Look for a f/2.8 lens that stays f/2.8 across the whole zoom range if you can get it for your budget. Problem is that something like the Panasonic bridge cameras have those good lenses but still relatively small sensors, so they're not so good in low light despite the great lens.

As you zoom in on most lenses you get less light into the camera, and that doesn't help things. You also need to be able to hold it steady, or have Image Stabilisation built into the camera.

Or you could move up to a digital SLR, but it's not going to be so easy to carry around a 'con. The newer DSLRs are good in low light, and quite easy to use if you start out in auto mode - they're quite smart about getting the settings right, too.

But it depends on your budget, and how much you want to carry.

[Rocket_Scientist]

For Point-and-Shoot camera users (like me), I always say (or will from now on),
there are two fundamental rules:

(1) Always, always, ALWAYS, get a camera with Image Stabilization
(that'z how we zpell it on thiz zide of the ocean)

(2) PTP: Pictures Take Practice, which is why digital cameras are so great.