Opera Playground

As Tim wrote in his blog,

The rendering engine used by the Internet Channel is the most advanced rendering engine publicly available from Opera Software.

The development is going on internally we guess, and we can confirm that with Olli's post, so what's the current situations we can imagine.
Ashizuka-san, one of my friend on irc and twitter, wrote a blog, of course in Japanese but the chart is in English.
You can view the different results of Merlin there, and may notice some regressions with Wii's Internet Channel. We just sit and wait for the next weekly release, full of fixes and new challenging features.