Still, national Republicans are embracing the concept: House Minority Leader John Boehner, R-Ohio, is attending a "tea party" event in California, and numerous Republican members of Congress are doing the same in their districts.
Michael Steele, the Republican National Committee chairman, on Tuesday sent an e-mail to supporters inviting them so submit "virtual tea bags" to Democratic leaders in Congress.
But even as the message is heard in Washington, many inside the GOP aren't quite sure what to make of the protests. While participants are expecting to be largely supportive of Republican causes, the events are being fueled by an anti-incumbent sentiment that may not respect party lines.
"Participation here across the country has much more to do with this very vocal sector of the electorate that is really, really fed up with the status quo in Washington," Kevin Madden, a Republican consultant, said on ABCNews.com's "Top Line" Tuesday.
"It's almost libertarian more than it is Republican or Democrat," Madden said. "These are instead very grassroots-driven, against Washington and against both parties."
Speaking Tuesday at the National Press Club, Grover Norquist, the president of Americans for Tax Reform, sought to distinguish the tea parties from tax revolts of the past.
"In the past, taxpayer activism has come because taxes were raised last week," said Norquist. "The rallies that have been going on for the last month or so … are not in reaction to a particular tax increase. They're in reaction to a government explosion of spending which people recognize will lead to higher taxes and probably inflation down the road."
Norquist was scheduled to speak at a tea party in the Washington, D.C., area, but he was not one of the organizers.
Some in the Republican party are hesitant to read too much into the events. This is just one attempt at a new kind of organizing by conservatives, but by no means will it be the last, said GOP consultant Phil Musser.
"I'm not sure if this is the full-blown test of the strength of the 'Netroots' of the right. But it's an important demonstration: Republicans have begun to recognize and use the social networking sites used by the Obama campaign," Musser said. "It will be fun to watch."
Already, organizers are making plans for what's next. Talk has begun of candidate recruitment for state and local races. Activists are planning for fights over state budgets from California to Connecticut. Another nationwide event -- scheduled for July 4 -- is already in the works.
Odom said he hopes and trusts activists will stay in touch to figure out among themselves how to harness the organizing tools they're honing.
"We're pretty confident that, post-April 15, there will be a plethora of new networks and organizations that develop organically," he said.
For a day, at least, it promises to produce quite a scene.
"We just want to show that the silent majority has a face," said Corie Whalen, a senior at Simmons College, who is helping to organize the event in Boston.
"We definitely have people that are going to come dressed in historical costume," Whalen added. "People are definitely bringing tea."
The Associated Press and ABC News' Teddy Davis and Ferdous Al-Faruque contributed to this report.