[Ken Case]

You can open perspective using an omnifocus URLs, like so:

omnifocus:///perspective/Inbox

omnifocus:///perspective/Due

I believe both Quicksilver and LaunchBar can open URLs directly? (I've used both for years, but I only ever use them to open apps, not files/URLs/etc.)

If not, you can drag the above links (or create your own which reference other perspectives) from your browser to your Desktop (or some other folder), then use Quicksilver or LaunchBar to open the resulting files.

Hope this helps!