A good number of useful links in the comments.
At a Cognitive Linguistics workgroup this, our speaker introduced us to Wuggy, a tool for generating pseudowords for psycholinguistics studies:
Wuggy is a pseudoword generator particularly geared towards making nonwords for psycholinguistic experiments. Wuggy makes pseudowords in Basque, Dutch, English, French, German, Serbian (Cyrillic and Latin), Spanish, and Vietnamese.
This is a PDF of a a paper I have my Research Methods students proofread for violations of APA style.