http://bhaidar.net/cs/archive/2009/10/20/radcontrols-for-silverlight-q3-2009-beta-2-v-2009-3-1019.aspxChanges on existing controls RadGridView What’s New: Horizontal and vertical UI virtualization with container recycling added for rows and cells All grid templates (rows, cells, etc.) lighten up Extended Validation Added metadata driven validation (viaenCommunityServer 2.1 SP2 (Build: 61129.1)