I assume that this is a question about IL-1? In which case I'd suggest a board search since this has been discussed previously:
a) Several different competitor IL-1 agonists in work. XOMAs is a little more targetted than most of the others (which might be good or bad depending upon the efficacy vs safety issues that crop up on IL-1 treatments).
b) XOMA appears to be targetting interesting indications not being pursued by competitors (e.g. diabetes), althought no inherent reason that other IL-1 agnoists wouldn't work as well.