I'm working on it! TopChelseaGirl over at How Soon Is Now? is having the same problem as me, having also reached her limit on photo storage. She left a comment for me and also mentioned it on her blog, which led to another comment from one of her readers suggesting that she use Flickr to store and then upload photos.
So, guess who just opened themselves a Flickr account and started uploading the holiday snaps? Yes, me; jump-er on-er of bandwagons.
If it works, prepare to be inundated with photo-laden posts.