Originally posted by: Kaido
If possible, bump up your budget by another $100 or so.  I would recommend either a Canon HF100 (flash-based) or a Canon HV30 (tape-based).  The HV30 has better quality, plus tapes are cheap and you can swap them out to record the whole wedding.  A Canon HV20 is also great if you can find a good price used.  I wouldn't really bother looking at any other cameras.  I used to own the equivalent Sony, the HC7, and it didn't hold a candle to the HV20.
There are a few accessories I'd recommend:
1. Use a tripod. Don't don't DON'T hold it freehand.  There are two kinds of tripods - photo and video.  Video tripods have a fluid head, which means they pan/tilt really smoothly unlike photo tripods which are designed to stay in one position.  You can get away with a photo tripod if you need something cheap and won't be doing any pans.  But if you can beg, borrow, or steal one, do it.  Like for your first dance on the floor, it's nice to have smooth pans to follow you guys around.
2. Get a bunch of extra tapes and knockoff batteries and keep them handy in a bag.
Here are the settings I recommend:
1. Set the picture to 24p and CINE mode.  This is the "filmlike" look, looks really awesome.
2. Press the White Balance button in settings, it's a quick and easy way to get the picture color-corrected for the environment you're in (outdoors, indoors, etc.)
3. Disable Instant Autofocus when it's on the tripod (menu setting).
4. Don't use Zoom!  Think about movies you've seen recently...movies don't use zoom.  If you use zoom in your Wedding movie, it will look like, well, a home movie.  You can use zoom before you shoot to zoom in, but don't zoom in or out while shooting.  It looks bad.  It will make your wedding movie look cheap and unprofessional.
Some ideas for shooting:
1. Ask ONE person to be the camera person for the whole day (or two, to switch off).  It's a mess to have equipment passed around from person to person and try to train them how to use it on the big day.  Ask your brother or cousin or friend or someone who knows how to aim a camera decently to do it.  Don't ask someone who is intimately involved and will be busy, like your parents or something.  They're not gonna want to do it.  Ask a good friend or a not-too-close family member, someone who won't really want to be super-involved with the wedding stuff like someone really close to you would want to be.
2. If you have a wedding line, plug in the camera to the A/C, put in a fresh tape, and record the entire line.  You can import this footage and do a time-lapse on your Wedding DVD, which is pretty fun.
3. The Canon cameras have a nice manual focus feature.  This is nice to get you and your spouse in focus for certain shots.  For example, have your video person focus in on you and your spouse and keep you two on the left side of the camera.  Later on when you edit, you have use this as your DVD Menu and put the word buttons on the right side of the widescreen.  You guys are in focus and smiling while looping the video, with everything else in the background blurry and then some sharp letters for the DVD Menu on the other side.  Looks nice.
4. Make a list of shots you want (coming out of the church, first dance, etc.) and review them with your spouse and video guy.  You will have NO TIME on your wedding day.  Things are insanely busy on your wedding day.  You have to make time before it happens - decide when to do what shots, give yourself a time window.
This is just a small list of things, but should be enough to get you started.  It might look overwhelming, but all you have to do is pick up the equipment, choose someone to handle it the whole day, and have a list of what you want recorded.  No plan = big crappy mess.  Simple plan = really good Wedding Video.  Don't overcomplicate things and don't just wing it.  A simple plan really goes a long way.  Just give your video guy a 3x5" card with the shots you want and sample times.  For example:
10:00am - shot of limo and us getting out to the church (or wherever)
11:30am - shot of us walking out of the church
12:30pm - lunch speeches
5:00pm - set up camera to record wedding line for an hour
6:00pm - garter throw
6:30pm - cake cut
Remember, use a tripod, don't use zoom, do the White Balance setting on the camera.  After your wedding is over and you have some time to sit down and edit it, you'll have a bunch of nice, clean, steady shots with good color instead of a garbled mess of handheld shots you don't really want to remember.
Also congratulations on the wedding 
