I don't know how often I'll get on here to converse with you guys, but my sister has just bought a cheap exercise bike that I can go steal in the day while shes working, I don't know what its set in but I'd like to follow your example and I'll aim for 70km.
I've just signed on to this site, I plan to start my healthy eating this week (after I've been shopping to pick some things up.)
If you have any other ideas of challenges let me know, I'll try and join in. I'm trying to boost my sisters fitness and weight loss too so i'll get her doing it as well.
Good luck