So, I was looking for a way to close up my Cerebremancer (Wizard/Psion) build with emphasis on Psionic side (I like it way more) and as little Manifester Level loss as possible, and... There's not a lot to work with. Most psionic Prestige Classes don't work with the character in question, some offer redundant class features, and one (ArchPsion) looked almost perfect, but required a "translation" from 3.0 to 3.5 (it's as simple a translation as taking away 0th level Powers/Psionic Combat and replacing the prereqs with their 3.5 equivalents), and it's basically off the table.
Now, there's a subset of Prestige Classes that don't advance specifically arcane, or divine spellcasters (Like Alienist and Magical Trickster, whose class tables read "+1 level of existing spellcasting class"), and some even progress just an existing class (such as Loremaster and Divine Oracle that read "+1 level of existing class"). The descriptive text usually does have information on Spellcasting/Spells per Day progression, but it still strikes me as an interesting choice of words.
The question is, if this choice of words allows a Psionic character to advance his Manifesting capabilities via these classes, or if Psions should stick to explicitly Psionic prestige classes.