Currently, all widgets are of a fixed size, which seems most necessary for the chart widgets (i.e. Top-N: Cluster CPU/Mem), but which is relatively arbitrary on other list-oriented widgets. I would like to propose that the vertical and horizontal dimensions of widgets and/or their respective grids be adjustable in order to fit more widgets on a page or else short/length them to hide irrelevant alerts/items or show more.
A possible frame of reference, though by no means specifically my desire, is the Log & Event Manager Monitor page, which even has two-cell widgets, which could be nice for some of the chart-based widgets.
Update: This was implemented in Virtualization Mananager 6.0 - see Dreams Do Come True: Virtualization Manager Integration with SAM and NPM.