The current default sorting mode is oldest to newest pictures, I’d love an option to reverse that, so I see my newest pictures first.
It would indeed be nice to have an option for sorting.
Somewhat related, I find it somewhat inconsistent that the Photo Stream sorts events and photos oldest to newest, whereas the Events sidebar lists event from newest to oldest.
Personally, it would make more sense to me if the sorting of the Photo Stream and Events sidebar were aligned.
I also find sorting of the Photo Stream and the sidebar very counterintuitive. Simply giving an option to reverse would solve the issue.
The downside of reversing the order is that this will also reverse the order in details view, so that going right will go to the past. Reversing the event list as an alternative would work better in that regard, but would have the drawback of always starting in that scrolled “split” state of the left bar.
Related blog post: Reversing the Photo Stream · Release Candidate 4 - Bildhuus Aspect