First thing I bought! I just saw it on ebay when I was looking for another umbrella and it was perfect! It will go with any dress and it is actually waterproof unlike most parasols... so will work if it rains! :)
I am thinking about making my own invitations. I have to work out if this is actually going to be cheaper cause generally the cardstock and the paper costs a fair bit but it would be nice to do because they would be unique!
I like this video as an introduction.
I was also looking at etsy for some ideas. I like etsy because things on there are usually pretty creative and unique also.