My initial goal to reach 99 Runecrafting started somewhere around December 2010. I raced Mrparris to 99. Sadly we both ran into IRL obligations (read: school) and our race came to a halt.
Last August, I restarted my RS character, 95 RC at the time and tried to complete my goal. I have since fallen in love with Runecrafting and it's about the only thing I still do. This is the result of all my hard work:
40M untrimmed Runecrafting XP!
I get asked by a lot of people if I'll continue to 200M and if I'll keep my untrimmed RC cape. I'm not sure on either, it depends what the new RC updates later this month bring.
EDIT: Decided that this wasn't quite good enough, so I took on the mother of all RC challenges. The 1M RC XP day.
Took me 18-19 hours, it was goddamn intense.