Well I was reading Lifehacker this evening and found this new expense tracking program on the Internet, Xpenser. The post on Lifehacker, "Track your Purchases as they Happen at Xpenser" is a pretty good description and overview of the application. This is an online expense tracking tool that allows you to keep track of expenses via email, sms, instant message, and voice through Jott.
I travel a lot for work and if I can use it to keep track of my travel expenses. I have everything set up and it was quite easy. I look forward to my upcoming trip to try this out.
You can read more about the program at the Xpenser Blog.