Yes, in a sense. I use tags (slightly more powerful) as part of awesome[1], a DIY tiling window manager (with very sensible defaults)

I have 18 tags across two screens with delegations as follows.

Screen 1:

1-2 Thunderbird + composing new emails

3-4 Jabber conversations

5-9 Coding related terminals

Screen 2:

1-2 work-related chromium

3-7 sysadmin related terminals

8 general internet surfing

9 IRC

--

I find clearly splitting out my work related chromium windows and non-work related helps with procrastination. HN doesn't call as often when it's not already open in a tab where I can see it.

Meta-[1-9] switches to a tag on the active screen, Meta-shift-j switches screens. So 1-2 commands brings me to whatever I'm looking for.

[1] http://awesome.naquadah.org/