Could you also bring all your gear to the 'public' performances?

I think - but cannot be sure - we can accept HD entries down South here, but they are probably 'transferred' to SD, so ... bit pointless really! I for one would never allow my HD camcorders to be used as playback machines - for judges or shows.
It is possible that clubs are holding back on buying HD projectors until all the problems are sorted - like the loss of sync that can occur. And until club funds can justify the expenditure.
As a matter of interest, we hold the Kent Film Festival in a large modern University lecture theatre, which has the latest and greatest HD ceiling mounted projector (with no access to the connections by mere mortals). The fully equipped projection booth - with duplicated controls at the lecture desks at the front - has touch screen control for everything - DVD players, miniDVD players (and VHS) - complete sound control system. All fully wired. And, believe or not the projector is (was) wired up ... via the S-VHS connectors. "Nobody can tell the difference", they said. And the first year we used this set up, everything worked perfectly - except for the touch screen that controlled everything - which died just a few minutes before the show. We had to quickly find another projector - and place it several rows back from the front in the audience (big throw theatre).
I don't handle the projection there now - but I believe this year they have wired up the projector's HD connections.
Back to the equipment side for a moment, a respectable miniDV player capable of playing back HD costs in the order of £1000. When HD entries are made on tape rather than DVD (many prefer tape to DVD because of the foibles of DVDs) the projectionists have the option of using one of the new HD miniDV players, if they have one - or their own HD camcorder. As i said, there is no way I'd use my HD camcorder for such a task, and although I have a miniDV SD player with monitor which I do use for such events, the upgrade cost to the HD version is way way down on my purchase list.
I think before complaining too much at clubs for not keeping up with everything that's currently great (until next week that is), a little tolerance would be appreciated. Yes, of course you want to show films at their best ... who wouldn't. But for many - most perhaps - having the film seen at marginally lower quality (and the difference is barely perceptible to the majority - as mentioned before, unless you put the two projections side by side) is to be preferred to not showing it at all.
I remember a pro film colourist once telling me that they spend a fortune getting the colours matched and 'right' in a movie, so someone can play it back via a DVD player onto their badly adjusted TV - and they don't even notice that something is wrong, that it doesn't look the way intended.
Such is life!