Articles in this special issue include the following: "Allophonic Splits in L2 Phonology: The Questions of Learnability" (Fred R. Eckman, Abdullah Elreyes, Gregory K. Iverson); "Native Language Influence in Learners' Assessment of English Focus" (M. L. Garcia Lecumberri); "Obstruent Voicing in English and Polish. A Pedagogical Perspective" (Wiktor Gonet); "The Acquisition of English Syllable Timing by Native Spanish Speaker Learners of English: An Empirical Study" (Francisco Gutierrez-Diez); "A Comparison between English and Spanish Subjects' Typicality Ratings in Phoneme Categories: A First Report" (J. A. Mompean-Gonzalez); "Profiling the Phonological Processes Shaping the Fossilized IL of Adult Learners of English as a Foreign Language. Some Theoretical Implications" (Rafael Monroy Casa); "L2 Evidence for the Structure of the L1 Lexicon" (Charles Reiss); "Finnish-English Phonetics and Phonology" (Kari Sajavaara, Hannele Dufva); "An Applied Interlanguage Experiment into Phonological Misperceptions of Adult Learners" (Paul Tench); and Review Article, "Learning the Phonology of a Language: An Optimality Theory Approach" (Juan Antonio Cutillas-Espinosa). (Individual papers contain references.) (SM)