I joined ClipDealer last year and uploaded 4 videos as a starter, on the 6th December - they're still sitting in the "Uploads" queue, awaiting inspection.  That's well over a month now.

I realise it's been Christmas and New Year, but even so, it seems a long time; is this normal for them?  Is there something else I need to do?

It happens that images get stuck for unknown reason. Last week I found out that I have few images in approval queue since last June...
It already happened in past so I (as shiyali wrote) - sent a note to support and they were approved same day.

I'm having a lot of problems with clipdealer, they don't answer my emails which I've sent to support, I've had a video which got lost in the queue so i re-uploaded it and support approved it, then about a month after it reappeared so i asked for it to be deleted and they don't answer me. Furthermore the uploads are taking forever to get approved (month+) and they are not generating thumbnails.

I might give up on these guys, they have been around for a while but i get the feeling that they aren't interested anymore. Hope I'm wrong.

Same problems here. And I also think they do not longer care that much. I think they are running the place at half power and see if it works out the next one or two years.
Anyway I thought of dropping them but then today an encouraging 30�+ sale came in so I made the decision I will continue to mass upload every 2 month or so when I have nothing better to do and lots of free time