I've been using one of these:
Lenovo 3 button scrollpoint USB mouse
http://shop.lenovo.com/us/itemdetails/31P7405/460/0E80436C80A748E6AA76791FC42C9CA3

It has been very reliable and comfortable to use.

Robby

On Feb 25, 2013 7:19 PM, "Ruslan Khusnullin" <ruslan.khusnullin@gmail.com> wrote:
On Mon, Feb 25, 2013 at 6:06 PM, Alexander Kapshuk
<alexander.kapshuk@gmail.com> wrote:
> I stumbled upon this one a while back. Never used one though. Been
> using a two-button mouse with a scroll wheel. Does the job.
Using a mouse with a scroll wheel about 10 hours a day results in pain
in my hand, especially in middle finger. Also using a scroll wheel
needs some additional accuracy and attention for just pushing it and
not scrolling.

>  http://h30094.www3.hp.com/product/sku/2545791
I saw this mouse many times and almost bought it but decided to try
Contour Mouse. After trying Contour I don't want to use a mouse of
this classical form, T400 looks a little more comfortable and
ergonomic.

If you will be able to use T400 in real life could you please share
your expirience?