Glass + ornaments = easy, cost-effective & elegant! I love these mini-ornaments (below)! You could use an array of glassware that you already own (or buy the glasses in bulk), and place a few of these ornament arrangements on each table at your reception.
Quite similar to another post of mine regarding Fall decorations... here are some lovely glass cloches encasing an array of ornaments (below). I really like how full the cloches are and how each one rests on top of an antique-y silver tray. Again, these would make great reception centerpieces.
Using grass as an integral part of reception decor has been a trend this year, but mostly with Spring & Summer weddings. Here (below), ornaments are nestled between blades of grass ~ just think how cute this would be as an escort card arrangement! Just write guest names & table numbers on cardstock and attach to the top of each ornament. The ornaments could even be favors for your guests to take home!
I love the simple look of clear candlesticks with plain matte ornaments resting on top (below). Using glitter glue or glitter paint, you could write the letters of your new last name on the ornaments and place them on candlesticks of varying heighths. This would be a smart arrangement for a guest book table, or spread out along a long head table.