Check out the status of AROS on the official web site (
www.aros.org), the official community site (
www.aros-exec.org), and the unofficial community portal (
www.arosworld.org).
IMO AROS has reached a good usable status. A web browser (Traveller) is in active development and a first release should be available in the 1Q 2008.
There is a new Live CD distro in development called "Velocity" which will be available for download sometime this month. A preconfigured and packaged VMWare image (VwmAROS) is already available for download at
http://vmwaros.org/.
There is a way to upgrade older installation with new nightly builds but I never really had success. I was told in a forum from the developers that all I need to do was to copy over the files from cd to hdd.
Try it out on Virtual PC for MAC. Worst it can happen is that it won't start and you've made a coaster if you burned a CD.
There is AmiGG as a messenger program and WookieChat is also available for AROS.
I could go on and on but most of the information is available on the sites I posted above. Another good site to visit is
http://arosshow.blogspot.comThere is now also an online shop where you can buy gifts with the AROS logo on it and money collected from those sales will be donated to AROS development. The link is available from
www.arosworld.org. 2 videos are also viewable on youtube about aros. Quality is not the greatest but they show aros in action. Those are available on the same site.
Hope this helps! :-D