Seeing as I have been spending an inordinate amount of time watching these two shows, I found this little tidbit from the Arrested Development Wikipedia entry to be of interest:
The character of GOB was the most challenging to cast. When Will Arnett auditioned, he depicted the character in an interesting way, different from expectations. The casting for the role of GOB came down between two actors in the end — Will Arnett and Rainn Wilson (now appearing on the American version of The Office). Ultimately, the part went to Arnett.Obviously Wilson's portrayal of GOB would have been vastly different, but I still can't imagine that it would have been as good as Arnett's. He's just brilliant in that role. Although something about George Michael's complete and utterly innocent awkwardness makes him my favorite character probably.
For the one of you who is curious (you know who you are), I just finished the final episode of Arrested Development and I have four episodes left to watch in season two of The Office (before I start season three). Also, I thought that the early plot in season three of AD was a little weak, but that the last few episodes were among the funniest of the series.