Full rooting instructions for Huawei IDEOS X3 (U8510) are posted on [this thread][1] over at XDA:

> 1. Download the [Automatic Root Enabler][2] for the X3. For more recent versions I suggest checking [original thread][3] and the forum
> it's in as I may not be able to update this thread all the time.  
> 2. Install the latest USB drivers for the X3. Search for the latest version of "HUAWEI Android Phones USB Driver" from the [Huawei
> Downloads site][4].  
> 3. Turn on USB Debugging from Settings -> Application -> Development on the X3.  
> 4. Connect the X3 to your PC via microUSB.  
> 5. Run the Automatic Root Enabler and it should start rooting your phone automatically.


  [1]: http://forum.xda-developers.com/showthread.php?t=1341630
  [2]: http://www.file-upload.net/download-3872290/Automatic-Root-Enabler--Huawei-U8510-IDEOS-X3-.exe.html
  [3]: http://forum.xda-developers.com/showthread.php?t=1200195
  [4]: http://www.huaweidevice.com/worldwide/downloadCenter.do?method=index