I posted this same deal at Slickdeals, but now methinks that the BackpackingLight crowd will appreciate it more. Here goes: eBikeStop.com has Black Diamond's Ultra Distance Z-Pole Trekking Poles (carbon fiber shafts) on sale/clearance - these same poles won a Backpacker's magazine 2011 Editor's Choice and are ultralight at 9.2 ounces per pair.
The only size still in stock is 120cm version (5'8"-5'11") - http://www.ebikestop.com/black_diamond_z_pole_ultra_distance_trekking_poles_120cm-OP2003.php
Price for poles only is $103.95 + $3.00 oversize item charge + $8 shipping for a total of $114.95 - note that these poles usually retail for $149.95.
Also, free shipping is available with code bikerbunny (expires 4/20/2011) if you spend at least $125.
My recommendation for free shipping filler is an Outdoor Research Helios Sun Hat for $23.95 (which is about as good a price I could find for this hat anywhere):
Med - http://www.ebikestop.com/outdoor_research_helios_sun_hat_sand_md_57cm-CL8413.php
Lg - http://www.ebikestop.com/outdoor_research_helios_sun_hat_sand_lg_59cm-CL8414.php
XL - http://www.ebikestop.com/outdoor_research_helios_sun_hat_sand_xl_61cm-CL8415.php
With poles + hat you are shipped for $130.90, which is still about $20 less that what REI/Backcountry charge for the poles alone.