I found out a pretty nice plugin which perfectly suited my needs about dealing back and forth between a local SCR and Lat/Long data with various web tools, so I thought I may share..
It's called Lat Lon Tools and it's an open source project developped by the NSA.
This tool is able to zoom easily to Lat/Long coordinates copy pasted from your clipboard or open directly a point from QGIS to a map in your web browser.
