Delta has just announced that as of March 1, 2011, Gold Medallion status (the tier requiring 50,000 medallion qualifying miles) will get you SkyTeam Elite Plus status. This is comparable to Star Alliance Gold or OneWorld Sapphire status, meaning you and a guest can access a SkyTeam lounge when traveling internationally on a SkyTeam flight.
Previously, only Platinum Medallion members (75,000+ medallion qualifying miles per year) and above had SkyTeam Elite Plus status. This move definitely makes Delta more competitive, given that all the other US legacies give you lounge access when traveling internationally at the 50,000 elite qualifying miles tier.
Between this and the SkyMiles expiration policy change, it has been quite a day for Delta…
(Tip of the hat to TMtravelworld)