Using saved searches is the only way I know, too. Then of course you could assign saved searches to toolbar buttons. DO9 allows you to filter file lists by name in place, but not by dates. The main difference would be the result of a saved search is presented as a "collection", with the display "style" associated with the collection, not your regular folder display style (such as columns shown and their order, column widths, etc.).
I usually just let it sort by date in descending order (when checking my linux server /var/log directory, e.g.). It would be great if DO chould take a page from Explorer and implement the grouping feature.