Richard Thomas of the Cyberlot blog has thrown together a piece of the Zend Framework mailing list that isn't there so far - the ability to search the archives. He's put together this search page to help with that matter.
Seems like the same question is asked every day, or the fact that you can't do it is complained about in one way or another so here it is.
Search the mailing list all you need ;) It only updates when I take the time to run the script so it will always be a few days behind.
A few days behind is still much better than nothing, and it looks like he's got quite a bit of the list already parsed.