With a $1K deposit at 10% APY for 7 months, you'll earn about $35 over what you would earn in a 4% account. Both a husband and wife could open one for a total of $70 extra dollars.
Wescom seems to have these types of deals often. It had offered a similar grand opening special for another branch back in June 2007.
Membership is open to those who live, work, worship or attend school in Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara or Ventura counties. There is a one-time membership fee of $15, and a minimum required deposit of $1 into the regular share savings account. This $15 fee is waived in this grand opening special. According to the service rep when I called in March, they don't do a hard credit inquiry when you apply for membership or accounts.
The credit union is federally insured by the NCUA (Charter # 66703). It's a large credit union with $3.8 billion in assets and 334,367 members.
Thanks to the reader who mentioned the special certificate in the finding deals post.