Well it's official:

http://www.wizards.com/magic/magazine/article.aspx?x=mtg/daily/feature/42a

There are some other rules changes too: Token ownership, Deathtouch, Lifelink, Combat Damage. There are terminology changes listed below. Also a tournament procedure change with mulligans.

Terminology Changes:
In Play -> Battlefield
RFG -> Exiled
(to) Play (spell) -> Cast
(to) Play (ability) -> Activate
e.g "Cannot play spells or abilities" becomes "Cannot cast spells or activate abilities"
At End of Turn -> Beginning of End Step.

The rules changes for Combat Damage are most interesting.

Mana burn changes:

1. Mana pools will now empty at the end of every step, where it used to empty at the end of every phase.
2. Unused mana in a mana pool will not cause lose of life when it drains.

Potential impact on vintage cards?
1. Mana Drain will lose it's only draw back. Potentially climb a little in value. Unless this change is viewed as too over powered and it finds its way onto the restricted list (knock on wood).
2. Mirror universe based strategies (if they even exist any more) will become worse.