Solar Energy and Congress

Wow, I still don't really understand they way American Laws are made. According to news reports the Senate amended the housing economic stimulus bill with provisions to extend solar tax benefits. Last year they tried a similar thing which in the end was shot down. I wonder, if they changed the solar tax credit to not have a cap, whether I could claim the difference between the $2000 cap from last year and the 30% on this year's tax return. Would be nice, but I doubt I will be able to do this.