I just ordered one of these:
A babywearing poncho! It has a little flap that lets out a hood on the front OR the back (perhaps I should say AND the back!) so I can hang a kid on either side (or both!) and have a hood for each of us on the rainiest of days!
Oh I'm so excited. This was the one thing that was missing for a nice winter here in the rainforest...I walk everywhere, so good raingear is essential!