Logentries is a log management and analytics service, which takes log files and produces useful searchable information and statistics.
You can import Logentries data into Hosted Graphite using the leexportpy tool.
Logentries have a useful blog post to help you get started.
You just neeed to add your Hosted Graphite API key to config.ini:
[Services] [[hosted_graphite]] api_key = <Your API key>