However Calibre also has a nice feature called News.
Try it! You can leave Calibre running and have it download your favourite news source and prepare a nice looking ePub for you.
They also support Instapaper.com !
So now I simply let Calibre do the job for me
I simply have to save the articles in Instapaper.com and I'll find them ready on the eBook in the evening
And I told Calibre to download other news sites in the morning before I wake up
How cool is that?