A friend introduced me to Guerlain Terracotta Kohl Kajal which she bought this month in the States. The sales assistant ensured my friend that it would, 'Make your eyes pop!' (Although I'm not entirely sure that's a good thing... 
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Anyway, it's beautifully easy to apply on the inner rims, and has relatively good staying power. The deep colour is superbly intense, I love it. I've been defining the outside of my eyes with black liquid liner for 10 years, now at 30, I think a change will do me good 
The only problem is, I can't find it for sale in the UK. I managed to buy one on eBay, but it appeared to be the only one listed. If anyone sees it in a shop or finds it online, please do let me know! It's well worth the effort of hunting it out.