5th generation ipod touch & Nike+ compatibility

Hi guys

I bought yesterday a pair of Nike shoes equiped with Nike+ technology which I'm willing to use. In fact my shoes carry the nike+ technology of the following type:

http://www.nike.com/plus/products/training/

According to Nike, the nike+ technology is compatible with iphone (3GS,4, 4S) or ipod touch 3rd and 4th generation

http://nikeplus.nike.com/plus/support/#answers/detail/a_id/25469/session/L3RpbWU vMTM0OTI0NjQwOC9zaWQvWkYyUHVNN2w%3D/p/3169,3700

As I don't have an iphone (I might by iphone 5 but next year), I'll have to go for an ipod touch in order to be able and monitor my activity. And here are my questions regarding compatibility:

1. Is the new ipod touch (5th gen) compatible with nike+?

2. If yes, does it carry the nike+ sensor in its body (like the iphone 4s) or do I need to plug the Nike+ sport adapter?

3. If I need to plug the nike+ sport adapter, I suppose that I'll also need one Lightning to 30pin adapter, right?

4. Are older/other ipod devices compatible with Nike+ technology? i.e. ipod nano?