What will Princess Kate's Royal Wedding dress look like, and who will be the designer? Any ideas?

We've no idea what the dress will look like. She's been very successful at keeping it under wraps.
We also don't know for certain who the designer is; several names have been mentioned. Interestingly,2011 Wedding Dresses Trends, Sophie Cranston of Libelula is now being suggested, and I had wondered about her as a possibility. She designed that black velvet coat that Middleton wore to a wedding some weeks ago.
Sarah Burton of Alexander McQueen; Alice Temperley; Philippa Lepley; Daniella Helayel of Issa; Bruce Oldfield -- all have been suggested.
Let's just wait and see.