Nanosatellites part of Endeavour payload

This is a technology I've been watching for the last 15 years. Once you reach a particular amount of compute at the scale of a playing card, you start having the ability to create 'meta' satellites out of clusters. Thin whisker like conductors trailing like long cilia beyond one of these can use the magnetic field of the earth to do station keeping and move around without fuel (using only electricity from solar cells to add charge to the whiskers.)

The 'smart dust' people and others are working along these lines and could create a new market for satellite delivery which consists of filling various voids in an otherwise 'full' launch with nano-satellites which, once deployed, would work their way toward the rest of the group and then join into their network.

What would be the implications for space junk in orbit? Is lots of dust-size stuff more dangerous (would spread over a wider volume, or is it just like having a normal satellite but only most of it is empty space)?

It still seems like a long way off, but I'm quite convinced that model rocketry's "sputnik moment" is coming.