Home for Christmas by Melissa McClone
All I Want for Christmas is You by Lisa Mondello
The Baby Made at Christmas by Lilian Darcy
Celebrate! a boxed set with stories by Barbara McMahon, Linda Barrett, Rogenna Brewer, Karen Sandler, and Debra Salonen, featuring stories about Christmas, Hanukkah, Thanksgiving, the Fourth of July and Father's Day
The Santa Sleuth by Heather MacAllister
And if you enjoy historicals, Mary Jo Putney has a Christmas novella called The Christmas Cuckoo
Last of all (but not least), a boxed set of Christmas novellas titled Mistletoe Kisses and Yuletide Joy by Jo Beverley
And if you haven't yet checked out my novella in A Puppy for Christmas (in the left sidebar), please do. Fizz, the puppy in the story, is an adorable little matchmaker.