@gumumawi: I just tried this after reading your post. Lo and behold, ALL the new deskbabes cards appeared on my carousel!
This may sound silly but if you look at the top left of your carousel, there is a FILTER button. This allows you to select only DB or only VG or both to be added to the carousel. If you already know about this, I apologise and the problem is elsewhere. Then it's possible that with a software upgrade, this is reset to only VG? I dunno. But it just worked for me :)
I've seen this mentioned recently and was afraid to post it myself before as it seems to be a 'Best kept secret.' BUT, as there is no discount on the carousel, I don't see a problem any more :)
If you don't like what you see on your carousel, quit VG completely (so you don't see the 'V' in your systray) then go into:
>Your Username, AppData, Local, vghd, Data. Then hit the END key and look for Demos.Lst (Correction: Just found in latest beta that it's just called Demos now.) You can safely delete this file. Then restart VG and Voila! Your carousel will re-populate. I can't guarantee whether new girls will appear right away or not but each time I've done this just after new cards were released, I got the girls on my carousel :)
Edit. A couple of hours later: When I learned of this trick, it just went backwards in time to the beginning of VGHD. NOW it appears to be random. The last 3 times I did this, I'm getting all the lesser quality cards from past and present mixed in. If this was designed to do this deliberately to try and sell older, crap cards, well then, you should forget this idea guys. But I really don't understand why Totem would try to push older crap on us when there are much better cards that guys WANT to buy! Oh well, time for bed:)