Obama Stimulus plan - Mortgage rate of 4.0%?

I read this article http://news.yahoo.com/s/ap/20090206/ap_on_go_co/stimulus_housing saying that the votes didn't go through for the lower mortgage rate of 4.0 as part of Obama Stimulus plan. If you read/heard of this stimulus plan, please share with me. I am thinking of refinancing my mortgage with a... show more I read this article http://news.yahoo.com/s/ap/20090206/ap_on_go_co/stimulus_housing
saying that the votes didn't go through for the lower mortgage rate of 4.0 as part of Obama Stimulus plan.

If you read/heard of this stimulus plan, please share with me.
I am thinking of refinancing my mortgage with a lock in rate of 4.8% + 1 point that would expired end of this week. Should I go with this rate? What's the chances that the 4.0% rate stimulus plan would go through?
Update: LGuz
the $15,000 tax credit do not apply existing home mortgage.
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