Looks like those Mac Minis are getting smoked right now, poor little guys. I can't load the page unfortunately to see myself, but could you use GNUStep to compile the examples on any flavour of box?
I know I feel so bad for them. We are working on some temporary fixes (including caching which as we all know is really easy to do) and changing the way we isolate the code submissions so we can get more throughput. GNUStep might be an interesting long term fix.