Universal Androot allow you to root an unroot your android phones with the easiest way.this app is that it supports a wide range of Android devices such as acer liquid, x10 or N1.

The following devices are listed as supported by the article author:
Google Nexus One (2.2)
HTC Hero (2.1)
HTC Magic (1.5)
Dell Streak (2.1)
Motorola Milestone (2.1)
Motorola XT701
Motorola XT800 (2.1)
Motorola ME511
Sony Ericsson X10 (1.6)
Sony Ericsson X10 Mini Pro (1.6)
Acer Liquid (2.1)
Vibo A688 (1.6)

Download
Universal Androot 1.6