Thanks Vivyip for letting me know about this bonus.

LINK

Link to a PDF file with bonus terms


Terms:

To qualify for $200 bonus, open any Comerica business
checking account during January 7 – February 29, 2008.
Minimum opening deposit must be new money not
already on deposit with Comerica Bank. Business checking
account must remain open for six months. Also sign up for
a no-fee Business Check Card and conduct at least one
signature-based transaction within four months of checking
account opening.

Note: For certain accounts, monthly maintenance fees are
waived when minimum balance requirements are met. Ask
us for details.

Comerica will verify that you have met the terms of the
Bonus offer after your checking account has been open
for six months and will deposit a $200 cash bonus to your
business checking account.

Current business checking account customers of Comerica
Bank are not eligible for the bonus. Cannot be combined
with any other offer. We reserve the right to modify or
end this offer at any time. One cash bonus per business.