I'm sure they will soon. They haven't made a page for "The Dumping Ground" on the CBBC website yet
so I guess that's probably why but we should expect to see it in two weeks time or so. Also, I think this is the last week that CBBC will be on BBC1.
Just to let you guys know, repeats of Tracy Beaker Returns are currently being shown at 4pm on weekdays (on CBBC). (I've started watching them again along with repeats of The Sarah Jane Adventures which later follows).
They have, but there's not much on it yet: http://www.bbc.co.uk/cbbc/shows/the-dumping-ground
First episode is a 60-minute one, on from 4:30pm on Friday 4th January.