We've installed Tapatalk, which is an app for Blackberry, Android, and iPhone.
It looks pretty good!
There are free versions for Blackberry, Android, and iPhone... but they're unfortunately read-only. (So you can view posts, threads, and PMs, but you won't be able reply.)
The paid version for all three systems is $2.99. Some other forums use Tapatalk, so if you download the application to your mobile, you may be able to browse them as well if their admins have installed the plugin.
DoA will still be usable in the standard browsers on your mobile, but this is a bit better suited to DoA's wide, text-heavy format. It's fairly userfriendly as well!
If you choose to download the app, you can just search to find Den of Angels by name.
We hope to eventually add mobile-friendly skins, but for now this is the best that we can do.