Ladies and Gentlemen... get ready to welcome your newest member of the Boston Celtics... Rasheed Wallace!An NBA source said tonight that Detroit free agent forward Rasheed Wallace has committed to sign with the Celtics on July 8 when free agents are able to sign. Wallace is expected to get a two-year deal using the mid-level exception (expected to be about $5.6 million to $5.8 million).Oh baby... things just got very interesting around here.