Each day March Madness gets bigger.  The Big East Tournament, Big 12 Conference Championships and the Atlantic 10 headline today’s March Madness action, while the ACC and Big 10 Tournament join tomorrow.

Today in the Daily Sports Roundup: College hoops conference tournaments continue, the Celtics meet the Heat, and the Blackhawks take on the Hurricanes.

Tipping off on the hardwood  . . .

It’s Boston at Miami in the marquee Eastern Conference clash in the NBA on Wednesday night. The Celtics fell 86-79 to the Magic on Sunday, and they’ll be missing forwards Kevin Garnett and Glen Davis and guard Rajon Rondo against the Heat. Miami turned up the offense in a 130-127 win over the Bulls on Monday night, with Dwyane Wade having a huge performance: 48 points and 12 assists.

The top Western matchups for Wednesday are the Lakers at Houston and Dallas at Portland, while Denver will play host to Oklahoma City. As well, it’ll be Utah at Atlanta, Toronto at Philadelphia, Chicago at Orlando, New Orleans at Washington, New York at Detroit, Memphis at Minnesota, and New Jersey at Golden State. The Warriors will enter Wednesday on a three-game losing streak.

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The march toward Madness . . .

Four more big college hoops conference tourneys get underway on Wednesday, with the Big 12, Conference USA, Mountain West, and Pacific-10 all seeing action. The opening-round Big 12 matchups are Baylor vs. Nebraska, Colorado vs. Texas, Iowa State vs. Oklahoma State, and Texas Tech vs. Texas A&M, with all games at Oklahoma City’s Ford Center. The Mountain West’s Wednesday matchup has Air Force vs. Colorado State at Las Vegas‘ Thomas & Mack Center.

In CUSA it’s Rice vs. Marshall, Southern Miss vs. UCF, East Carolina vs. Tulane, and SMU vs. Houston at Memphis’ FedExForum on Wednesday, while the Pac-10 offers up Stanford vs. Oregon State and Oregon vs. Washington State at the Staples Center in Los Angeles. As well, the second round of the Big East tournament gets underway Wednesday, with Providence, Marquette, West Virginia, and Syracuse taking on first-round winners at Madison Square Garden.

Taking a trip around the rink . . .

There are just three games on the National Hockey League’s schedule for Wednesday night, including the Hurricanes taking on the Blackhawks in Chicago. The Hawks were bounced 5-1 by Colorado on Sunday, with forward Martin Havlat suffering a lower-body injury. The Hurricanes blanked the Rangers 3-0 on Monday. Cam Ward stopped 28 shots to earn himself the shutout in that contest.

Ottawa hosts Tampa Bay on Wednesday night in a battle of lowly Eastern clubs, while Vancouver travels south to Anaheim to meet the Ducks. The Canucks fell 3-2 to Los Angeles on Monday night, getting goals from Alex Burrows and Taylor Pyatt. The Ducks are coming off a 3-2 loss to the Wild on Sunday, as Jonas Hiller gave up three goals on 28 shots. Anaheim is 3-6-1 in their past 10 outings.

Rounding out the Roundup . . .

Jeff Gordon hasn’t won a Sprint Cup race so far this season, but a series of solid performances has him sitting atop the standings after four events. NASCAR’s top series is off this week, giving bettors a chance to take a long look at Gordon’s 12/1 odds to win the Sprint Cup championship in 2009. Jimmie Johnson remains the favorite at 3/1 odds, but he’s just 13th in the standings so far this season. Kyle Busch (4/1) and Carl Edwards (5/1) remain the top challengers on that list.