It looks like Young Buck got his wish, that of getting out of his G-Unit contract. According to multiple reports, Buck has been released from G-Unit, although it hasn't officially been announced. A "100% reliable source" says that 50 Cent decided to let Buck go.
To futher back the speculation, Buck took to his twitter saying "The Official Annoucement COMING SOON!!!," he tweeted.
Young Buck – Talks On G-Unit & 50 Cent