iPhone + Messages Beta: prevent iPhone from vibrating for every message? I'm using the Messages Beta on Lion to receive iMessages on my MacBook Pro. I also have my iPhone set up with my iMessage account.

When I receive a message, it's delivered on both devices. If I read the message on my computer, it disappears from the lock screen of my iPhone, so it doesn't fill up during a conversation.

But, this doesn't prevent my iPhone from vibrating every time I receive a message — and if I'm having an extended rapid-fire iMessage conversation with someone using my computer, this can get annoying. Is there any way to prevent this from happening?
I'm afraid that's not possible in the current iOS.  

But there are a few work-arounds:


You can define a specific vibrating tone for that specific contact person which will do almost nothing (unlike the default long and hard vibrating)
or you can disable vibrating when you enter Silent Mode and when you start having this rapid-fire conversation, just switch your iPhone to silent mode and no vibrating will happen!