Best wishes to the bride-to-be, and congratulations to the groom.
My mother says this is The Proper Thing to Say on such an occasion. Do not argue with my mother.
Regards,
Shodan
Congratulations!
Congratulations to both of you.
While your mother is absolutely correct, I think that in this case we can get away with it. Since we know both jsgoddess and Asimovian to be total catches each is entitled to congratulations.
Blessings on you both!
Oh, and please register somewhere great like American Science and Surplus.
Yay!! It couldn’t happen to two nicer people. Happiness all around.
Kick ass!
Congratulations!
Dang, that alone might make it worth getting married.
Hmm, for the bar, we need 12 Erlenmeyer flaskes and 12 graduated cylinders.
For the kitchen, 12 petri dishes, a microscope and a magnetic stirrer.
This is lovely! Congratulations!
Ooooooh… my lady and I may have to steal this idea! 
Congratulations to both of you!
Millions of great wishes and congratulations!!!
Congratulations!
Congratulations! And I’m flattered you chose my birthday to get engaged on 
This is why I love this place so much. Mazel tov, you crazy kids - may your years together be long and happy.
Yes…um…just like we’d planned. Yes!
This is wicked cool news! Congratulations to you both!
So cool!
Congrats to both of you!
“May all your problems be little ones!”
Mazel tov!
Now really, where else would you get sage wedding advice such as this?
Best wishes and congratulations to you both!
::ducks LOOK emanating from the general direction of Shodan’s mom::
Awesome! Congrats!