How to make your own rollup with google reader.

This is one of those posts where I explain something to myself that ought to be simple but wasn't.

To create and publish an aggregation of many blog feeds you can just

1. put them all under a reader folder
   (click manage subscriptions bottom right of your reader.google.com page)
2. make that folder public
   (click Settings, Folders and Tags
   --select the Folder in question
   --use the dropdown to make that folder public
   --click View Public page
   for example,
   

In reader, you can also tag items. You can use Step 2 above to publish tags just as you did Folders. This will create a page of items that you have given a specific tag.
For example, http://www.google.com/reader/shared/user/15578203462828253660/label/SIC


Of course, now you have two different pages. Suppose you want a single page that combines items you have tagged with other feeds?

1. subscribe to your own blog's published sub-feed of tagged items,
   (for example http://jonschull.blogspot.com/search/label/SIC )
   
2. and put that sub-feed in a folder you have published
   (the aforementioned http://www.google.com/reader/shared/user/15578203462828253660/label/SIC )
   

And suppose you want to publish only some items from a friend's feed? Either

• manually tag them with a tag you are publishing
• have the friend tag them in a specific way, and put the friend's sub-feed in a folder you are publishing

And suppose you want a quick way of adding your own items to one of those public pages?

• Make a note (click Notes under Your Stuff, top left in Reader)
• Find it in your Notes and give it the tag you want.
• the notes bookmarklet looks helpful here too
  

But beware: it doesn't look like you can unpublish notes. There may be other gotchas. I may be confused.