Get help with RGraph
Add your question to stackoverflow.com
If you're having a problem with RGraph that you think is more general or would benefit from multiple pairs of eyes you can post your question or problem to the stackoverflow.com website.
Remember to use the rgraph tag on your question, which I watch, and I'll then see it and try and help you out.
Get in touch via Facebook or Twitter
If you want to send your query via Twitter or Facebook you can do so on the RGraph Facebook or Twitter profiles.
Remember though - Twitter has a character limit so longer questions may be more suited to this forum or Facebook.