Violet will randomly flap her arms about.. That's the closest we have to waving, and it isn't even in relation to anything
We always say goodbye and wave her arm for her when someone's leaving but I don't know whether she's picking it up or not.
As for kisses, I just say "give mummy a kiss" and then I kiss her. For the last few months, she has been trying to eat my face (especially my chin, that's where I always kiss her when I'm playing with her) so I don't know whether she's giving me a kiss or just trying to eat me / use me a teether