There's a new version, the TRIP Act (Tax Rebate and Incentive Program) floating around. Again, it's nowhere near becoming law as it will probably need to be packaged into a larger bill, and then passed in both the House and Senate before it goes to the President for a signature. It's in a more advanced stage than the Explore America Tax Credit previously mentioned because that hasn't been introduced as a bill yet, while this one has.
The changes to it are that it's 4k per adult (8k per couple) plus an additional $500 per dependant child. It's a 100% credit instead of only covering 50%, and there's no $50 minimum for eligible expenses.The minimum distance of 50 miles from residency stands, but this one also allows for a standard mileage deduction on top of gas expenses.