Dropbox updated its desktop clients yesterday with new photo features, including one that can give you up to 5GB of space and today the Android app has followed suit with a new beta that automatically uploads photos after you take them.
You can choose to upload photos and videos over Wi-Fi only or over 3G and Wi-Fi, though it won't upload large videos over 3G. Your first photo will give you 500MB of extra space, just like the new desktop client, and you can get up to 5GB of space if you keep uploading photos and videos. This version also does away with file size limits, so you can upload any file you want to Dropbox from your phone. It also supports resuming file uploads if you have a network issue, which is great. Hit the link to read more about the update, and download the APK for installation.
Experimental Android Forum Build -- 2.0.9 [Dropbox Forums]