I disagree with you that expanding beyond wedding (at least, on one branded site) is a good idea. Niche domains and sites are going to garner more trust from consumers than a giant website that does everything. Look at tinyprints.com and weddingpaperdivas.com — you can start covering more areas, but splitting the sites into different branded areas will probably do more good than doing everything with one website.

Templates are a WeddingType.com area, and will be explored. :)