Some commenters' on Caldwell's site aren't too pleased with her idea to solicit cash to fund her wedding.
One commenter, known only by her handle "Christina," wrote, "asking for contributions has a certain 'yuck' factor."
Another wrote, "So you are begging for your wedding?? How sad."
Khris Cochran, founder of the site DIYbride, which gives readers do-it-yourself-ideas for their big day, said that she believes Caldwell asking guests to pay "what is essentially an admission fee to their wedding" is in "bad taste.
"Though many rules of etiquette are getting a modern makeover to adapt to changing attitudes and technologies, asking the couple's guests to pony up cash to pay for their wedding -- or any other reason -- is still tacky," Cochran wrote in an e-mail to ABCNews.com. "There's really no way to spin it to make the couple look anything but greedy."
"I understand couples are needing to save some money but requiring guests to pay what is essentially an admission fee to their wedding is in bad taste," Cochran said. "The better option would be scale back the wedding to fit comfortably within the couple's financial means and not put the burden on their friends and relatives."
Etiquette expert Anna Post of the Emily Post Institute said that there are ways to have unconventional weddings without making guests feel uncomfortable.
"The worry is that some guest will feel like they have to do this or they won't feel welcome," said Post. "There is still a very strong tradition in America that when you're hosting people you're taking care of them. "
Caldwell said that she isn't letting the critics get her down, even those who are family. Caldwell admitted that some of her relatives weren't so keen on the idea of only giving her cash for her wedding, and will still likely give her actual gifts.
"I'm OK with the negative comments. It's untraditional, and we understand that," said Caldwell.
One post in which a commenter called Caldwell and Parker "selfish" bothered Caldwell the most, she said.
"I don't see how I'm selfish," said Caldwell. "It's the same thing as asking guests to buy you crazy gifts like the ones you see on registries all the time, like a Wii or a microwave that costs $200 and you would never buy yourself."
And, said Caldwell, if you're not interested then don't donate.
"The wedding is still taking place."
The big day is set for Nov. 11, 2009.