I will say I saw a gel ant farm at someone's house once and it did LOOK very cool. I could see it being an interesting introduction to young kids - though frankly, I think dirt/sand set-ups are better and less gross for that purpose, though not as "space ship" like.
I would NEVER use one for a colony with a queen. Even with just workers I feel bad for them. Having recently bought some of those Uncle Milton ants, I watched the Pogonomyrmex working and grooming each other and burying their dead one by one. The only good thing is they are wild-caught and so the ones who get caught are generally older and have lived out happier days in the ant nursery.
Formiculture Journals::
Veromessor pergandei, andrei; Novomessor cockerelli
Camponotus fragilis; also separate journal: Camponotus sansabeanus (inactive), vicinus, laevigatus/quercicola
Liometopum occidentale; Prenolepis imparis; Myrmecocystus mexicanus (inactive)
Pogonomyrmex subnitidus and californicus (inactive)
Tetramorium sp.
Termites: Zootermopsis angusticollis
Isopods: A. gestroi, granulatum, kluugi, maculatum, vulgare; C. murina; P. hoffmannseggi, P. haasi, P. ornatus; V. parvus
Spoods: Phidippus sp.