This is not a gushing fanboy style blog, so I can offer no guarantees as to the quality of the projected District 9 feature length expansion of the short film Alive in Joburg. But I still think the theme of apartheid in relation to aliens (the film is set in South Africa) looks quite promising. At the very least, it may warrant a chapter unto itself in a future edition of Ziauddin Sardar's and Sean Cubitt's Aliens R Us: The Other in Science Fiction Cinema.
The official website for D-9 is also worth exploring. To my mind it all sounds very much like the social imaginary of a biopolitics for whom border/immigration controls function in the same manner as antibodies.. .....I won't even begin to cite precedents; you know who you are!! (i.e. the alien as liminal figure, an allergic symptom triggering hysterical attempts at control etc etc.....)