Those are really cute live cams!
When we lived in DC, I used to watch the live feeds of the Tidal Basin during Cherry Blossom season to see what the foot traffic was like. If it was too busy, I wouldn't head down there. If there weren't "a lot" of people, I'd head down there and walk the basin.
Any new obsessions? Outside of researching different teas and what not for my middle child's birthday, I don't really have anything that consumes my time, other than scrapbooking!