Joakim Noah and Derrick Rose are both having All-Star calibre seasons for the Bulls, but whether they get on the team in Dallas is another story. It's unlikely either will get voted onto the Eastern Conference squad, but one or the other might get selected by the coaches or the league could appoint one or the other depending on injuries.
Derrick Rose has played at an All-Star level for the last month or so. He was hampered early in the season, but once his ankle completely healed, Derrick has really turned it on.
Joakim Noah's improvement this season is well-documented and he is certainly worthy of All-Star consideration.