Yeah, no, I totally understand. My problem with kissing, for instance, is that being a guy if I go and kiss every Glitch I run into, I'm afraid someone is going to take it as harassment. Girls can get away with it, because it's more socially acceptable for them, and they are not often seen as sexual predators. And even though Glitch is not really a very sexual game at all, kissing can still cross the line for some people.
Another option would be a "kiss, kiss" (or even "triple kiss") for a Euro style greeting. The current kiss feels more like a lips-to-lips smooch than a hello kiss.
Damn you carl, now i clicked on the link in your post and I'm stuck in an endless loop! I hope they add "use tongue" as a response to your kiss endevours!