AutoRegex
Btw, does anyone know a library/program which can reverse engineer a regex from multiple source strings? E.g.  14:51 [info] 51 some message
  … more of 51 lines …
  15:22 [error] 24 error!
  … more of 24 lines …

  ^(\d\d:\d\d) \[(info|error)\] (\d+) (.+)$

Or maybe not a regex, but a structured pattern.