The second Alpha of the Ubuntu 10.10 development cycle has been made available for download today.
The changes it contains are not considered stable and as such this Alpha is not recommended for installation on any computer that you require to be operable!
Whilst there are no dramatic visual or application changes just yet, users brave enough to hop aboard the development-express may wish to note the following changes in particular: –
Improved Software Centre
One of Ubuntu’s most defining additions is undoubtedly the Ubuntu Software Centre and Alpha 2 sees the titular app gain some significant UI changes compared to both Alpha 1 and Lucid.
Part of this revolves around the prepping of space to allow new applications to be added to the store post-final release as well as making better use of space for existing applications, single paned departments and user navigation.
Combined with the above UI changes comes the ability to tweet your favourite applications (complete with apt:url link for one-click install) direct from the store itself (via Gwibber).
Sound Menu changes
Whilst listening to music in Rhythmbox you will notice the sound menu has begun its metamorphosis from being a simple ‘volume slider on a stick’ into something much more useful with Rhythmbox integration and much more to come. 
Netbook Edition
Ubuntu 10.10 Netbook Edition Alpha 2 will look different to testers thanks to addition of the new Unity launcher and introduction of a global menu. 
Opening up Evolution you will no-doubt spot a streamlined netbook-friendly interface called ‘Evolution Express.