I'm wondering if there's an environment for my Ubuntu to try out Android 3.0. I just WANT to!!!
Normally, if you want to test another operating system (OS) or an application on another OS you use a virtualization program like Virtualbox or VMWare Player. Personally, I use Virtualbox PUEL (Personal Use and Evaluation License) version. That will create a new computing environment on top of your running Ubuntu.
Then to test Android 3.0, you will need to install the Android Software Development Kit (SDK) and follow the instructions in the website.
This way, you will protect your host system from messing up while doing software testing.
I hope this helps.
You can download a linux version of the SDK here and install it on ubuntu if you wish, though there is only a 32 bit version available at present for linux.
The site also list the steps to get it up and working on your pc.