How do Buddhists express condolences? Since converting to Buddhism, I've been unsure how to express condolences when people pass away. Everything familiar that I might say comes from a Christian perspective such as "being in a better place" or "with the Lord now". 

Simply letting the family know that I'm thinking of them works. But I'm wondering what is typical or traditional in Buddhist countries (or among experienced Buddhists in the west) where teachings of impermanence and rebirth may change the mindset regarding death. What is the typical way to express condolences among Buddhists?
Here in Sri Lanka, we typically say "Anicca Vata Sankhara" or "Vaya-dhamma Sankhara" in the bereavement notices. When you meet the family members, you put your hands together and greet without smiling. You are not expected to say anything unless you are giving an eulogy. When you talk to people, you are expected to talk quietly and not to gossip. You can either inquire about funeral arrangements or engage in a Dhamma discussion.

I suppose in the West, it's customary to say something. So you can probably say "May he/she attain Nibbana soon!"