I like the structure and options, but I will be careful with jugdement, I just started using Dipity. When you look at the design it reminds you of Plurk, yes, but...there are few alternative views avaialable (depending on content, I guess): timeline, flipbook (for visuals), list, map. You can zoom in and out on the timeline to see the trends. It's 'embedable' and 'share-able'. And most important, you can feed to Dipity from major social media sites:
This is how my profile looks like after adding few sources.
I will keep an eye on it. Looks like soon you will be able to send tweets from here too.