Just found a very economical multimeter with tachometer that some of you may be interested in for work on your bikes - it's from Harbor Freight, item 95670, and the price through 12/26/08 is $24.99 (normally $34.99).
Here is a link to the item for more info, but the price is in the current retail flyer.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=95670
Goose