This falls somewhere between a feature request and a bug report.
https://github.com/sdague/parser_ical is a praser for feeds module to import iCal into drupal 7. At the time of request it wasn't a module but is available on Git. It also uses the php library http://kigkonsult.se/downloads/index.php#icalcreator and once configured can be used to create nodes from an iCal feed.
Feeds Tamper Issue
If a user tried to rewrite the field values using tamper the follow message comes up
Cannot use object of type ParserIcalCreatorComponent as array in ../sites/all/modules/feeds_tamper/feeds_tamper.module on line 53
It would be great if tamper was able to handle iCal parser feeds