When should we expect an announcement on all the data that's been collected so far?
They had been taking data from the time the seismometer was still on the deck, but they are not the top-quality data the mission was designed for. Perhaps I can elaborate a bit more. The three seismometer elements are sensitive to RF, thermal and acoustic noise and Brownian motion inside the sphere. The less noise, the fainter signals can be detected. Vacuum better than 1e-4 mbar eliminates Browninan motion and thermal shorts through the gas. The sphere itself has a thermal constant of ~4 hours; this is the characteristic time for which an external temperature change propagates into the interior to the sensors. This is pretty damn good, but not great. When the WTS goes on, the thermal constant increases to ~12 hours. Essentially, the diurnal cycles won't play a role in signal detection. The seismometer now is very sensitive to the wind, which will change dramatically with the WTS. Until now, the pinning mass had to be moved back to reduce the coupling of the seismometer to the spacecraft (a tether loop had to be opened).
So, it's a working seismometer in a great shape, but the quakes that can be detected at this time are rather large, and the origin cannot be determined (that uses Rayleigh and Lowe waves, which are 100s of times fainter). And there is a log-log dependence of magnitude versus frequency for quakes, big ones occur far less often. So, unless something major happens soon,we won't hear from the science team for a while. The first high-fidelity data will be taken when the "mole" (HP3) gets deployed. Its hammer will create "pings" that will be recorded and analyzed to learn about the structure of the Mars top crust layer.