Also, my new little batch of Snow-In-Summer got a few blooms(this is a great plant for cascading over rocks or along borders. Can't wait for mine to grow in more):
My new Threadleaf Bluestar has some blooms:
And there a couple of other things here that aren't blooming but are pretty to look at just because of their foliage.
Hostas are just starting to open up:
Spireas have pretty color:
And if you still don't like any of these ideas, you can always go with a simple pot or two of annuals, to tie you over until summer stuff starts blooming!