Anyway, to now provide my billion cents; I must say I've tried an app called "iTransmittion" out of cydia and it supports both torrents and magnet links (I've actually tested both motheds successfully), I did, however, find that the downsides to iTransmittion are that it doesn't seem support multitasking by default (meaning you have to hack the info.plist to make the iOS think it supprts it or use backgrounder) and sometimes with magnet links you can't really tell if the demagnetization process is working right because it often takes ages, but still either wayit still works none the less.