UPDATE: The deal appears official now, with details here.
It remains unclear how far along negotiations are at this time.
However, rumors about Seguin have been circulating since before the NHL Draft, and general manager Peter Chiarelli stated earlier this week that he believed Seguin needed to become a better professional. In essence, Chiarelli didn't sound too pleased with his young forward.
Eriksson has also been a name rumored as potentially available. Dallas has been active in offseason free agent chatter and was believed to be a favorite to land Vincent Lecavalier. Ultimately, that proved not to be the case. New general manager Jim Nill is evidently ready to make some changes in Dallas. A potential swap of Eriksson for Seguin would certainly achieve that.