Xin and I have been talking about this a lot lately. We definitely want to do it, but Xin has been pretty busy with work/uni/other stuff lately, and I don't have access to the webhost. I think the best I could do on my own is throw together some kind of internet scavenger hunt lol...like I said man, it is in the works, but you'll have to give it a little bit more time.
In around 2 weeks, I will have a lot more freetime on my hands, hopefully will get them up then. I can quickly upload the old challenges sooner if you like? But it wont have a scoring system