Now, I know we already have an align tool and very useful it is too. Far more useful though would be the inclusion of switchable guides. Many apps now utilise this feature such as OmniGraffle, Photoshop, Aftereffects, and our beloved Xcode Interface Builder. Something that we can start snapping the position of fields, buttons and even the start/end points of graphics would be awesome and make development so much faster. Have a look at what the others are doing and see if it could be imitated in some way (assuming it doesn't steal from their intellectual property

All the best
Pi