The form layout on the trends page will probably change a bit, perhaps to some drop-down boxes.
Since you mentioned that the trends page may change a bit, I would like to submit some ideas that I had about the trends page.
I consider the trends page to display the 'critical' trends. If too many graphs are displayed, the page can get overwhelming or confusing. I also find useful that more than one vmstat/netstat/etc graph is available. What I would like to see is, if a particular graph displayed on the trends page has sibling graphs (i.e. netstat1, netstat2, etc) that an icon would be displayed next to the zoom icon. This icon would link to a page with all of the sibling (netstat*) graphs.
On the graph page, offer the option to have the displayed graph data exportable(i.e. user can click a link and download a file with the raw RRD data points). This would also be great on the metrics report too. As to the export formats, I am not sure, possibly csv and xml.
Just some thoughts, thanks again for Hobbit. ~Steve