What about a table topper for the centre
Something like this
http://www.simplicity.com/t-free-qui...le-Topper.aspx
http://lovelaughquilt.blogspot.com/2...y-hexagon.html
http://www.pinetreelodge.net/images/...rightStars.pdf
One of the board members, Riversong, did a great tutorial on making octagonal tabletoppers but I can't seem to find it at the moment