Have a look at this YouTube wedding video. I think this is a great Mother of the Bride Speech example. She is interesting to listen to and includes some good funny stories. She includes the groom and other members of the family in a warm welcoming way. This great wedding speech is just the right length too.
I have to include this YouTube wedding video. This is how NOT to do a best man toasts This is called "one of the worst best man speeches" - now thats not something to be proud of! If you are nervous then practise beforehand and get hold of some wedding speeches samples that you can learn from.