I am not married, but I decorate wedding for a living,
some popular caentrepieces at the moment are

- 90cm martini vases filled with coloured water (to match the colour you ave picked for your wedding) with floating candles. This goes best in a room with a high ceiling
- 50cm martini vases filled with pink and white marshmellows
- chocolate fondue and a selecion of dippers
- 90cm spaghetti vases, with coloured sea salt mixed with glitter in the bottom, really long strands of willow with fairylights attached.
- small vases filled with different lollies
- a selection of lanterns covered in rice paper to match your colour, placed on a round mirror, with a coloured sash underneath the lanterns, then 3 or 5 tealights scattered around.

Alot of people are going for the chocolate scatters, that come in a variety of colours, they look like pebbles but are in fact edible smarties
They also like their petals scattered on the tables.

For bomboneires, the ROC candy is really really popular as you can have your own little message in each piece, or alot of people are just going really simple and giving a single heart shaped chocolate in a colour to match the wedding.

I better not give any more away incase the boss finds out