Since I am also my own webmaster most holidays I would revamp my entire site and put up holiday greetings... I enjoyed it, but it is very time consuming. I would like to think the public viewing a website notices the difference also. I think it can make a great difference in how they view you and perhaps even put them at ease that you just are not a static sales person only looking for your next deal. Since we conduct real estate primarily from the web - a new search engine that we are using for out of state has the ability to change instantly the look of the web and change the look for the holidays. There are many choices for each holiday and I love it. I was commenting to the owner of the company yesterday how much I loved the look of the product, and he advised me it is a brand new template I am using. He is rolling out anohter new one for New Years. The one below is from our Virginia, and Maryland real estate website. The site is designed by ewebengine.com
RE/MAX Paramount Properties 678-595-5283 Direct
Or 888-940-0074 Toll Free Office
Atlanta Real Estate Agents, Alpharetta GA Homes for Sale, Dunwoody GA Homes for Sale, Atlanta Real Estate & Atlanta Homes for Sale 
Gwinnett Homes for Sale
Atlanta Real Estate Blog, Cumming GA Homes 
Jim I use a CMS called Joomla! and there is an easy module to install the lets it "snow" on your site. The best thing about Joomla! is that if someone writes a module you can have it up on your site in seconds instead of having to mess around with a template. I have not tried changing these things but I might now that I see other people are trying it. I thought it might just be fun.
The big problem with templates is whether they will take all the features you have already or if its hours and hours of work transferring everything over.
Kent Anderson (Coldwell Banker Resort Realty) Anytime!
Eau Claire Wisconsin Real Estate Agent & e-PRO® Realtor® Shane O'Gorman (Eau Claire Realty, Inc.) Too much snow is Java and it tends to not be viewable in many browsers. I avoid JAVA at all costs. The template is the back end, and I am excellent at web placement - I use Blogging etc for niche targeting to fill in the gaps. My best return is still primarily the web.
Jim I am guilty of not changing my header and information often enough.
John Walters (7824 Real Estate of Louisiana) This one I love. I wish I had this on my Atlanta site.
Jim,
Colorful post.
Wishing you and your family a Happy Holidays.
Neal Bloom-Realtor ® Assoc.-CRS-Weston FL (RE/MAX Premier Associates) Neal - Happy Holidays! Enjoy them! May your New Year be blessed with health. wealth and G-d's love!