Venue for a trustee's adversary proceeding to avoid allegedly fraudulent transfers was appropriate in the district in which the bankruptcy case was filed. The out-of-state defendants had moved to dismiss, arguing that 28 U.S.C. § 1409(b) requires such lawsuits to be brought in the defendants' home district, but the court denied that motion, noting that § 1409(b) addresses only proceedings "arising in" or "related to" a bankruptcy case and fraudulent transfer avoidance actions "arise under" the Bankruptcy Code.