On all of them, with the exception of Sprint of which the project and date have yet to be announced.
Cross Country hasn't started yet in the strict sense, but some of us are already computing for it in advance. (A.k.a. bunkering results.) Though as you saw in the prior discussion, Amicable Numbers is much worse than Rosetta with respect to RAM consumption.
Javelin Throw, with its special scheduling and scoring scheme, requires tight resource allocation. We have some people (see NumberFields section in Tony's
Weekly Stats) who each set aside a certain fraction of their respective computers for a certain duration per "throw", and who coordinate via direct conversation.
As you can see, City Run has less than a day left. And in view of the circumstance that the Universe@home project may require quite a lot of time between when a user reports results and when the server can validate it to give credit, the practical end of this event is approaching very quick now indeed.
Running Rosetta may be the best bet. You could run Amicable Numbers on the GPU, but that would leave very little RAM to run Rosetta in parallel.
I wonder what the Sprint project will be, notably if it will be a medical one. (There is a whole bunch of more number-theoretical projects out there though, maybe we'll get more number theory in the sprint too.)
Past Pentathlon disciplines and projects are listed in
the Pentathlon archive, timeline tab.