Not to resurrect an old thread, but... I have been storing a lot of serialized data lately, and came across a pretty useful web tool to easily view it when needed. Basically This tool enables you to serialize or unserialize arrays (mainly) with several 'serialization' functions : php serialize, json, yaml, and php var_export.
Supposedly also does following:
•unserialization of broken serialized array (recover / repair "php serialize" arrays)
•deep unserialization of serialized serialisation !

(for php serialize)
http://www.unserialize.net/serialize