Blockbuster has split with its creative agency of record, Doner.

Culver's Restaurants selected MARC USA as its marketing agency of record, responsible for all advertising, PR and media buying for the 368-restaurant chain. The agency bested Cramer-Krasselt, McClain Finlon and BVK for the win. Jacobson Rost previously handled the account.

Fifth Third Bancorp tapped OLSON to handle its advertising and marketing communication services business, following a review.

zig was named agency of record for Brookfield Zoo, which is managed by the Chicago Zoological Society, following a review. Leo Burnett previously handled the account. Scope of work will include strategy and both traditional and non-traditional creative.

Invisible Fence named St. John & Partners as its agency of record, to handle strategic brand planning and analytic services for the company.

Yankee Spirits named Strategis as its agency of record. The account, previously handled on a project basis, was awarded without a review. Spending was not released.

Microsoft is seeking an agency to handle a creative assignment, valued at $300 million. Lead Microsoft agency McCann Erickson, JWT, Fallon and Crispin Porter + Bogusky are pitching the assignment.

Bank of America placed its media account in review, valued at $250 million. Prometheus Media currently handles the account.

E*TRADE selected Grey New York to handle creative chores on its $180 million account. The agency mutually parted ways with BBDO New York following a conflict of interest with BBDO's Bank of America assignment. Agency.com remains E*TRADE's online agency, while Spark Communications (formerly Starlink IP) will continue to handle TV and online media buying duties.

Bard's Tale Beer Co., brewer of Dragon's Gold gluten-free beer, has named Hunt Adkins as its first advertising agency of record. First work will break in March 2008. Spending was not released.