I've used fitness apps on friends smartphones, and I've been waiting for a small, GPS-enabled MID/PMP forever, but it doesn't seem like there are any on the horizon. Archos and Apple let me down with their recent releases, and there's zero news on the Samsung Galaxy PMP. That said, I just started thinking about using Nike+ on the new iPod touch (or maybe the nano). Does anyone here use Nike+? Does it work well? Thanks.