[ltp] IBM three button mice?

[Felix E. Klee]

A relative needs a USB mouse for his new T43.  It should be a three
button mouse since many of his LINUX applications require frequent
operation of the middle mouse button.  A scroll wheel is not that
important.  Now I know that IBM/Lenovo offers mice that have middle
mouse button.  However, I've some questions:

* Can anyone recommend one of these mice?

* Which one does have a reasonably large middle button?

* What about the 800 dpi models?  I've read somewhere that a certain
  800dpi mouse makes the mouse pointer move very fast under LINUX,
  without a way of throttling.  Is this an issue with the IBM mice?  If
  not, then the "Optical 3-Button ScrollPoint Mouse (800dpi) PS/2 & USB"
  could be the best selection:

  - Part Number: 31P7405

  - <URL:http://www5.pc.ibm.com/de/products.nsf/$wwwPartnumLookup/_31P74
    05?OpenDocument>

  - <URL:http://www.ibmlove.co.kr/design/gycc830/Option/31p7405.gif>

  Does its scroll button work under LINUX?

BTW: The 15" XGA display of the T43 is quite unevenly lit: The bottom is
noticeably brighter than the rest.  Fortunately, this isn't an issue
here: The machine will only be used for office work and for web
browsing.

-- 
Felix E. Klee