Update 2/09/08: The CD rates have fallen. Please check the credit union's website for the latest rates.
State Department Federal Credit Union (SDFCU) is offering a special 5.35% APY 15-month share certificate. The minimum deposit is $5,000, and it must be new money.
The credit union also has a new-member special until the end of December. You can choose either a 7% APY 12-month CD with a minimum and maximum deposit of $1,000, or a 7% APR loan with a term of 12 months and a $1,000 min/max. Since the CD is capped at $1K, it'll only earn you about $20 over a 5% account.
SDFCU's field of membership is primarily employer-based. In addition to the US Department of State, there are about a hundred other employers listed.
SDFCU's headquarters is in Alexandria, Virginia. Branches are located in Virginia, Maryland and Washington D.C. The credit union is federally insured by the NCUA (Charter # 435). It has $879.7 million in assets and 65,712 members.