The speed of this thing is incredible, and after all launchers I have tried, this one managed to keep 5 homescreens filled with widgets and shortcuts in under 20MB or RAM. For people with low memory phones (256MB or even less) this launcher is a must have. Scrolling is smooth as butter, it is very easy to configure, and it gets updated periodically. The last update, however, dropped the scrollable widgets support, not that I ever used it, but it seems some users are missing that feature.
It also features a scrollable dock, and Sense-like homescreens preview.
Head of to the application thread at XDA developers or get it directly from the Android Market.