Holy ****...so I ordered new racing flats since I have quite a few races planned over the next several months. I got the Nike Lunaracer...they just showed up yesterday. These are the lightest shoes i have ever felt in my entire life. I used the Nike Zoom Kennedy Track and XC spikes for Track and Cross Country (duh), and the x-country ones are actually moderately heavy for spikes, a) because they're size 14 and b) because the have a kinda thick rubber spikeplate. But these flats i just got are lighter than even the Track spikes (which are basically like wearing socks), but somehow have all the cushioning (almost) of my regular trainers.
I knew that the new Nike FlyWire (c) technology was good, but wow.