QUOTE(JamesK @ May 22 2012, 12:18 PM)

I conduct along in strict time, with the fingers noting the bar number. Therefore, you don't need to count ["1,2,3,4...." or "1 and 2 and 3 and 4 and ..."]. And then only counting the first beat of the bar, cos you only have 5 fingers (1 hand must hold the instrument). I find this very useful when conductors windmill, make every beat a downbeat, or do expressive conducting rather than conducting the pulse (like a lot of professional conductors in a concert)

, or stop conducting altogether.
Conductors of amateur orchestras should be very wary of ceasing to indicate bars. I agree that lots of conductors don't distinguish downbeats from others. Even if they have a clear pattern, that is visible only from their front, by the central portion of the orchestra. They should consider what the principal bass and outside back desk of firsts can see: only the height of the previous beat, which should be above the shoulder only on the last beat of each bar.
Deliberately abandoning the beat is fine if you know that every member of the orchestra knows the piece well enough to do a decent performance unconducted and that no speed variation is desirable. I find it interesting to watch Gergiev. In works that his orchestra knows well, he indicates shapes and moods, and probably lots of other things that I can't interpret, but doesn't bother too much about the time; in an unfamiliar piece, or something like Rite of Spring, in which even the LSO might occasionally be grateful for a bit of help, Gergiev's beat is clear enough for them to follow when they need it.
There is a thread on this forum, started by Kenny on 1 September 2008, called "What to notice when conducting?". One of my contributions, at the bottom of the first page, describes a very good conductor's* decision to stop conducting at a rehearsal, why he so decided and the problem it solved.
* Christopher Adey