Has the site been slowing down for anyone else? Over the last couple of days the site seems to take about 25 seconds to load pages 2-3 of any search, and page 4 never seems to load the thumbnails. I've deleted the cache on my browser and tested different browsers as well.

It's loading just fine for me. Perhaps there's a delay somewhere in the route between you and our servers? Try doing a traceroute; if you see anything along the way with high ping or that times out, that's where the problem is.