Lisa, Glow is a great effect, using overlaid Gaussian Blur is a great effect as well, using a color gradient over top of a file with an "add" or "Hard Light" mode also creates a dreamy effect in terms of the highlights.
For dreamy movement, nothing beats the Pixelan Steptime SpiceFilter, it simply rocks.
Ultimate S 2 has a dreamy setting, and here is a tutorial on one way to achieve it. Stan Stonefield has a tutorial with video on the VegasUsers site as well.

A slight variation on the "basic glamour look" would help. I learned much from Mr. Stonefield ( http://www.stonefieldmedia.com/ ) and made a little tutorial based on that. Add Glow, boost some of the values shown and you'll have a great dreamy look.
http://www.matthewroddy.com/tutorials/cathy-tutorial/cathy-tutorial.htm

Thank you very much for your tip - it works fine.

In my opinion nothing beats the real deal, a glass filter in front of the lens. HOWEVER, good glass filters are expensive, you need something to hold them and a good matte box can cost as much as the camera AND there's no way to get rid of the effect in post if they don't like it or you fluff it up.
That's not to say you should ignore filters, ones such as Black Mist and the grad ND filters along with the hardline ND filters can be very useful if you've got the time to setup the shot.
If all you've got is a cheap camera and don't want to spend the earth on large filters you can buy the screw on ones much cheaper, certainly a polariser is a good investment and again it adds a look that is impossible to achieve in post.
Bob.

Lisa, care to share your results?

Yes I have achieved the results using both techniques with Glow and blur. I should use these effects on my next wedding. You have to forgive me for not replying straight away as I have 2 very young children and only available when I get a minute to type.

Cheers and thanks again the advice

Since you're shooting video and can see the results "real time" here's an old trick that works great for the dream glow look - and it's both cheap and easy.
Get a pair of black sheer nylon stocking. Cut a piece about 5x5 inches and rubber band it over the lens. Instant soft glow. Try the same with regular skin toned stocking for a whiter effect.
If you're shooting a close-up of the bride, you take a cigarette and burn a small hole in the streched stocking which you center over the brides face. (don't burn your front lens element).
Check it out - I have used this technique forever and it still works great. Not effective with wide angle lenses, though.
v