...The following comes from Article VIII.C.6 and Article VIII.C.7. of the Call for the 2008 Democratic National Convention:

6.  Nomination of the Democratic Candidate for President: The Permanent Chair shall receive nominations from the floor for the Democratic candidate for the Office of President of the United States in the following manner:

a. Requests to nominate a presidential candidate shall be in writing and shall have affixed thereto the written approval of the proposed nominee and the name of the individuals who shall be recognized to make the nominating and seconding speeches on behalf of a presidential candidate and shall be delivered to the Convention Secretary at a location as specified by the Secretary no later than 6:00 p.m. of the day preceding the day designated for the commencement of presidential nominations.

b. Each such request must be accompanied by a petition indicating support for the proposed nominee signed by delegates representing not less than 300 or more than 600 delegate votes, not more than 50 of which may come from one (1) delegation. A delegate may not sign more than one (1) nominating petition for president and for vice president.

c. The order for nominating presidential candidates shall be determined by the National Chairperson of the Democratic National Committee, the Permanent Chair of the Convention and each presidential candidate, or his or her authorized representative, who qualifies to be nominated pursuant to this section.

d. Each presidential candidate shall be allowed a total of twenty (20) minutes for the presentation of his or her name in nomination by nominating and seconding speeches, the time to run without interruption from the recognition of the nominator.

e. Delegates and alternates shall maintain order during and following nominations for the Office of President and demonstrations shall not be permitted.

7. Roll Call for Presidential Candidate:

a. After nominations for presidential candidates have closed, the Convention shall proceed to a roll call vote by states on the selection of the presidential candidate.

The roll call voting shall follow the alphabetical order of the states with the District of Columbia and Puerto Rico and the territories treated as states for the purpose of the alphabetical roll call.

b. A majority vote of the Convention's delegates shall be required to nominate the presidential candidate.

c. Delegates may vote for the candidate of their choice whether or not the name of such candidate was placed in nomination. Any vote cast other than a vote for a presidential candidate meeting the requirements of Article VI of this Call and Rule 12.K. of the 2008 Delegate Selection Rules shall be considered a vote for "Present."

d. Balloting will continue until a nominee is selected. The nominee shall become the candidate of the Democratic Party of the United States for the Office of President upon the conclusion of his or her acceptance speech.

The gist of all this is that both Clinton and Obama get 20 minutes each to place their names into nomination.  After the nominating and seconding speeches are concluded, the convention proceeds to a roll call vote of the states until one of the candidates receives a majority of the delegate votes.

Should be fun to watch and I must say that I'm getting that tingling feeling up my leg that Chris Matthews talked about.