[Orgmode] filtering timeline view

[Ilya Shlyakhter]

Is it possible to filter the timeline view (agenda) by tag and/or by
headline regexp?

I use orgmode for a research notebook, where the outline organizes
ideas on various projects and sub-projects.
I put timestamps into entries when I work on them, so that I can use
the Timeline agenda view to quickly find recently
worked-on items.  But I want to be able to find only the _important_
recently worked-on items, skipping things like
temporary brainstorming notes.   I can tag the important items (or the
unimportant items) with particular tags,
or with particular strings in the headlines; but is there a way to
restrict the timeline view based on that info?

thanks,

ilya