22. The apparatus of claim 16 , further comprising: said processor using time-based phenomena to contribute to a determination of usefulness, said phenomena comprising any of newness of assets, rediscovery of assets, trend-based use, and periodic use of assets.
22. The apparatus of claim 16 , further comprising: said processor using time-based phenomena to contribute to a determination of usefulness, said phenomena comprising any of newness of assets, rediscovery of assets, trend-based use, and periodic use of assets. 23. The apparatus of claim 22 , further comprising: said processor refining usefulness by detecting and dampening attractive nuisance assets which show a large amount of activity even though they are not useful.