I've been playing around with it and this is my response:
Wow. Just wow.
It would be cool to see the source code side by side.
osu! (NOW) and osu! (THEN)
I just can't believe how far osu! has come within the past few years from seeing this release!
peppy, you've made a great game. I love it!
That also goes for the devs who also contribute to osu!
I wonder where osu! will be in a few years time...
Also, anyone else noticed how over the past two years how the connected user count has significantly increased?
I remember 6000+
Now 10,000++
Keep up the great work! Always looking forward to the next osu!build