Looks like in order to use playon, you need to run something on your local machine, no?
Yes, PlayOn runs a server agent on your computer and your Roku connects to that. It works well, though, and quality is pretty dang good. It'll stream any file than VLC player can decode, along with ESPN3, Hulu, and a variety of other web sites.
What's the difference between Hulu plus and regular Hulu?
Regular Hulu is free.
Do you get episodes faster with Hulu Plus? You usually have to wait a week after it airs on TV to see a show on regular Hulu.
Regular hulu is typically available the day after it airs. Not really a problem for me. And almost all of the shows I watch are on NetFlix and regular Hulu, so paying an extra $8/mo for Hulu plus is kind of pointless. You may see some benefit out of it.
PlayOn is pretty slick for streaming media from my computer, though.