We went to a wedding last weekend and the couple had used an ice sculpture for their table plan. This isn't the one (their's had a lot more flowers set in it) but I've grabbed this example from Google. It looked pretty impressive and certainly was a talking point.
While looking online, I also noticed that people used them with flowers etc set in them for table centrepieces. I've never seen ice sculptures used at a wedding before - cue a line of wedding aficionados to tell me it's all old hat ? They're not to everyone's taste (I know they wouldn't fit with the feel we're going for on our day) but just thought I'd share in case anyone was looking for inspiration.