From Jayski.com:

Dale Jr. to RCR? done deal? #33? UPDATE 2 RCR denies: FOX25(Boston's FOX affiliate) is reporting.......Dale Earnhardt Jr. will soon be racing under the same legendary #3 Chevy that his dad used to race in. A source with direct knowledge of negotiations tells FOX25 that Dale Earnhardt Jr. has finalized a deal with Richard Childress Racing Thursday night and an official announcement will be coming soon. At a press conference today to announce that he was leaving the company his late dad built, Dale Jr. said he would have mixed emotions about driving his dad's #3 Chevy, but again, FOX25 has learned that this is a done deal.(FOX25)(5-10-2007)
UPDATE: FOX8 News has confirmed Junior is negotiating late Thursday night with Richard Childress to join Richard Childress Racing. An announcement could come as early as Friday. Childress has scheduled a news conference Friday at Darlington Raceway, the site of Saturday's Nextel Nextel Cup race. Sports Director Rich Brenner has also confirmed the talks between Junior and Childress include plans for Earnhardt driving the #33 Chevrolet for RCR. Budweiser, the primary sponsor for Junior's #8 car with DEI, will follow him to his new race team. (FOX8 News)(5-11-2007)
UPDATE 2: been told by sources at the track that Richard Childress addressed the media at Darlington this morning and denies signing Earnhardt, details as I find any.(5-11-2007)
UPDATE 3: Richard Childress said Friday morning at Darlington Raceway that he has not signed Dale Earnhardt, Jr., to drive for Richard Childress Racing and is giving the driver time and space to weigh his options. Along with Hendrick Motorsports and Joe Gibbs Racing, RCR is considered one of three front-runners to sign Earnhardt, Jr. for 2008 and beyond, but the car owner emphatically denied that a deal already had been struck, has reported by at least three television stations Thursday. "Dale, Jr. just made a major decision in his career and in his life yesterday," Childress said Friday morning at Darlington. "And out of respect for Teresa (Dale Earnhardt, Inc. team owner Earnhardt), Dale, Jr. and this situation, let´s all give him some time to make the decisions that he needs to make and be fair. He´s got a lot of tough decisions to make coming up with the direction he´s going, and I just think it´s fair if we all let him have some space and some time to kind of think about what he wants to do in the future." Childress said that while he would welcome Earnhardt on his team, the two sides have not yet begun negotiations. "We will sit and talk, I´m sure," Childress said. "I´m hoping he´s considering us, but I think right now, we just give him some time and space to do is own due diligence on the race teams he´s looking at. I´ve been friends with the family for many years and I´m sure we´ll talk." As for television reports that a deal was already struck, Childress was categorical in his denials. "There´s nothing to it ... it´s way too soon to even talk about it," Childress said.(SPEEDtv.com)(5-11-2007)

More from Jayski.com:

No Dale Jr. to Hendrick: Cross Hendrick Motorsports off the list of teams interested in signing Dale Earnhardt Jr. Although he's spoken to Earnhardt, car owner Rick Hendrick said Saturday "there's no room at the inn" for NASCAR's most popular driver. Earnhardt is leaving Dale Earnhardt Inc. (DEI) at the end of the season. He wants to stay with one of the top Chevrolet teams so he can contend for championships, and Hendrick is the best in NASCAR right now with eight wins in the past nine Nextel Cup races. Richard Childress Racing and Joe Gibbs Racing are the next best Chevy teams, and both owners have indicated they are interested in speaking with Earnhardt. Only Hendrick had been silent on the issue, but as he walked toward pit road before Saturday night's Nextel All-Star Challenge, he said he was maxed out with four drivers right now and couldn't fit Earnhardt in his stable. "We're good friends and I've talked to him, because I really want him to make the best decision and do the best thing for himself," Hendrick told The Associated Press. "But right now, I'm full." Hendrick fields Cup cars for four-time series champion #24-Jeff Gordon, defending Cup champion #48-Jimmie Johnson, #5-Kyle Busch and #25-Casey Mears. All are under contract through at least 2008, and Hendrick is currently trying to extend Busch's deal. Hendrick said he's offered to help Earnhardt if he elects to field his own Cup team.(Associated Press)(5-20-2007)