Nappies.info is a good name. In fact, 'nappies' fits with .com for business/commercial purposes. Nevertheless it also equally fits with .info. It may be developed either as a site that provides information about different nappies' manufactures or as a price comparison site for nappies.
It can be considered a plural dic word. Very nice especially if optimized. Plus seems like a hot item especially for mothers. Low $xxx. Goodluck, wussa
Also just to add, the other extensions are developed which is a good sign. :D