[Brian]

A workspace can be in one of 4 states:

No snapshot, "Auto-save while browsing" setting disabled.
No snapshot, "Auto-save" enabled
Has snapshot, "Auto-save" disabled.
Has snapshot, "Auto-save" enabled.

Do any of those four states do what you're after? If not, what would need to be different? We don't know when we'll have time to work more on OmniWeb, but I can certainly write up a feature request for you. :-)