questionscan anyone suggest a good, inexpensive mini-mouse…

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Yes, I can.

http://www.amazon.com/HP-Optical-Travel-Covers-F4815A/dp/B00066HMJA

(It's currently priced at $3.99, and sold from an Amazon storefront, but it's little, and it's USB.)

Here's a replacement for your Belkin:

http://www.amazon.com/Belkin-Mobile-Retractable-Mouse-Black/dp/B001IWOBE0/ref=pd_cp_pc_0

$7.99

This one's my personal favorite:

http://www.amazon.com/Targus-PAUM01U-Ultra-Mini-Retractable-Optical/dp/B00007LTAQ/ref=pd_sbs_e_2

It has the added bonus of being sold directly from Amazon ($8.64).

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@shrdlu: Many thanks for the suggestions! I ended up dithering between the Targus and the Belkin and finally ended up with the Belkin.

It will be so nice not to have to click elebenty-nine times to get an active click to work....