The larger keikis on my noid phal are now about 3 months old. I still see no sign of roots emerging from these baby plants, but the leaves have been steadily growing in size. I trimmed back the spikes above where the keikis were emerging, mostly for aesthetic benefit. The upper parts of the spikes seemed unlikely to grow any more since all the nodes had been used up in the flowering last summer.
In addition to the trimming, I used scissors to expand the drainage holes in the plastic pot. I didn't like how the potting media was taking more than a week to dry out between waterings (the root health of this plant is mediocre currently). By enlarging the drainage holes and taking the plastic pot out of the larger decorative pot, I am hoping to increase the air circulation near the phal's roots.
Meanwhile, the nodes below the big keikis are slowly growing on all three spikes. I still can't tell what these are yet, although I won't be surprised if these turn out to be even more keikis.