I must say that Plurk has got to be my new favorite social site on the web! 
For those unaware, Plurk has the same purpose as Twitter does: microblogging or small updates in 140 characters or less. Never mind the weird name. 
Honestly, I wasn't sure about Plurk in the beginning. Compared to Twitter, the interface for Plurk is a bit more complicated and you have to play around with it a little while to catch the hang of it. But once you do, let me tell you, it is really addictive!
Updates from those you have friended will pop up on a dynamic timeline, organized by time and day. You scroll horizontally to see older "plurks". You're also alerted to new updates and friend requests in real-time with a little message!
Another nifty thing that makes Plurk unique is the ability to comment (reply) directly on other's "plurks". This allows for some actual "conversations" with other people! While twitter has the "@" to reply to twitterings, the messages can get lost in the stream of updates. You can view your replies and others' replies directly on an individual plurk on the timeline. Pretty cool.
A somewhat controversial feature would be karma. Plurk has wired its service to reward or retract "karma points" from users based upon certain activities. If you plurk regularly and are active you gain points, however if you constantly spam your timeline you lose karma! If someone rejects your friend request you also lose karma. That might seem stupid at first, but it's there so no one goes around trying to friend just anybody or hundreds of people at random or without reason.
I think karma is a nice addition, when not obsessed over, hehe. It adds some fun to the routine updates and moderates the users quite well. The Plurk developers have expressed a want for quality over quantity in articles like their safe plurking guide and FAQ page. Keeps things interesting!
If you want to try it out, then go for it! If you use that link you will automatically be added to my "fans" list and I can friend you easily!
If you are on Plurk, please friend me! Or you can comment with your Plurk profile link on this post. I'm always happy to network and/or make new friends online.
Well, I was able to pull the Plurk feed into Twitter using twitterfeed! Make sure you choose “description only” in the “Include…” dropdown box so it doesn’t display a doubled post.
As for something like twitterfeed for Plurk…have not found that yet.
I’m sure one will be developed soon though. Plurk is still a new system, born in May! 