Speakers for Eris?

Hi,
I just bought my Eris and I really love it. It's fun and very easy to use. Believe it or not, I had a phone that was ancient that worked well, but I wanted to be part of the fun.

Now that I have this awesome phone, I need to figure out how to use it. Is there hope for me? Anyway, it's really cool to have such variety in apps, and ease of use.

My question is about an external speaker. I'm going to Vegas, and want to play some tunes while I hang out in my room getting ready to go out! Can someone recommend a portable speaker or speaker system to bring with me?

Thanks, so much!
Debra