Even though a preview/beta released was suggested for April, we're fast approaching the end here with no sign of a pending release. But as a sign of good faith, Shape Services has gone and posted a few screenshots of their much anticipated IM+ instant messaging app.
Not too much can be gleaned in terms of features i.e. we don't know if it has a Live Tile/push notifications (though you would think that's a requirement for such an app), but the layout looks nice enough and it appears to embrace the Metro design, which is always nice.
Hopefully we'll be getting this in our hands sooner than later.