EXHIBIT 24

                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS: That the undersigned officers and
directors of PSB Group, Inc., a Michigan corporation, do hereby constitute and
appoint Robert L. Cole and David A. Wilson, and each of them, the lawful
attorneys and agents or attorney and agent, with power and authority to do any
and all acts and things and to execute any and all instruments which said
attorneys and agents, and any one of them, determine may be necessary or
advisable or required to enable said corporation to comply with the Securities
Act of 1933 as amended, and any rules or regulations or requirements of the
Securities and Exchange Commission in connection with this Registration
Statement on Form S-3 relating to the Dividend Reinvestment Plan approved by the
Board of Directors on March 18, 2004. Without limiting the generality of the
foregoing power and authority, the powers granted include the power and
authority to sign the names of the undersigned officers and directors in the
capacities indicated below to this Registration Statement, to any and all
amendments, both pre-effective and post-effective, and supplements to this
Registration Statement, and to any and all instruments or documents filed as
part of or in conjunction with this Registration Statement or amendments or
supplements thereto, and each of the undersigned hereby ratifies and confirms
all that said attorneys and agents or any of them shall do or cause to be done
by virtue hereof. This Power of Attorney may be signed in several counterparts.

         IN WITNESS WHEREOF, each of the undersigned has executed this Power of
Attorney as of the date indicated opposite his name.

<Table>
<Caption>
        SIGNATURE                                 TITLE                                         DATE
        ---------                                 -----                                         ----
                                                                                      
/s/Robert L. Cole                                                                           April 15, 2004
- ------------------------------     Chairman, Chief Executive Officer and Director
Robert L. Cole                     (Principal Executive Officer)

/s/James B. Jacobs                                                                          April 15, 2004
- ------------------------------     Director
James B. Jacobs

/s/Michael J. Kowalski                                                                      April 15, 2004
- ------------------------------     Director
Michael J. Kowalski

                                                                                            April 15, 2004
- ------------------------------     Director
Craig J. Mancinotti

/s/Longine V. Morawski                                                                      April 15, 2004
- ------------------------------     Director
Longine V. Morawski

/s/Sydney L. Ross                                                                           April 15, 2004
- ------------------------------     Director
Sydney L. Ross

/s/Edward H. Turner                                                                         April 15, 2004
- ------------------------------     Director
Edward H. Turner

/s/David L. Wood                                                                            April 15, 2004
- ------------------------------     Director
David L. Wood
</Table>