From Daytona to New Smyrna
I haven't tried Maria Bonita yet, because I can't bring myself to go anywhere but La Fiesta, Nova Road and Dunlawton Ave. in Port Orange, a bit closer to NSB. Awesome food, juicy margaritas, extremely friendly service that transcends the language barrier.
For seafood/dive try Our Deck Down Under, the southeast side of the Dunlawton Bridge. (Careful, there's a place on the northeast side that's not as good.) Take the bridge east over the intracoastal, hang a sharp right, almost a u-turn, there you are.
Farther south on the beach, Wilbur-by-the-Sea etc., is Boondocks (on the river side). I haven't made it there yet but locals love the grouper reuben and fried platters.
I second WB's warning; all bets are off March 2-11. Expect crowds and long waits nearly everywhere. But if you want to soak up the biker culture, hit The Last Resort, on U.S. 1 where NSB meets Port Orange, the bar of Aileen Wuornos fame.
I don't know about the south side of NSB, but for good Italian try Bella Valentino's on U.S. 1 just south of the airport, next to the strip club (not kidding). I've heard mixed reviews of The Garlic, just east of the causeway next to Norwood's.
For burgers at the beach try Breakers at the end of Flagler in NSB. For seafood, there's Oceans on 3rd Avenue, Boston Fish House on S. Atlantic in NSB. The Beacon is a good spot for breakfast and lunch and dinners there are decent too. It's also on Flagler in NSB. JB's is fun but if you're there during bike week it's nearly impossible to get in (and, I kid you not, they actually often have a dual of two guys blowing themselves up). Mi Mexico in Silver Sands (below NSB on S Atlantic) is good mexican. Clancy's Bar in the Publix shopping center has good mexican and seafood. Sea Harvest on the riverfront used to be pretty good but the last couple of times I tried it, the fish wasn't fully cooked. For more upscale in NSB try Stellas at the Skyline at the airport, Norwoods for seafood, Spanish River Grill for latin influenced dining. Great Chinese/Vietnamese in S. Daytona at Leannhs on Beville Rd.
Supposed to be a good Italian place on US 1 on the South side of NSB but I haven't tried it yet.