nnir r00lz!

[Steinar Bang <sb@dod.no>]

For those who haven't yet tried it:
 Move point over an nnimap folder (not sure if all IMAP servers
 implement search, but I know for sure that dovecot does), or a gmane
 nntp group, and type `G G'

 When prompted, type a string you know can be found in an article in
 that group, and press return.

 You end up in a Summary buffer, holding the matches.  Move point on top
 of an article that looks like the one you were looking for, and type `A
 T'.

 The temporary summary buffer with the matches disappear, and the
 article under point, and its entire thread (if it belongs to a thread),
 is shown in the Summary buffer of the group that was under point, when
 you did the search.  And the articles in the thread can be read,
 ticked, and responded to (with the gnus-posting-style of the actual
 group).

Just the way I've always wanted search in Gnus to work,

Many thanks to Andrew Cohen for picking this up, and making it work! :-)