It looks like Yahoo! is testing their mobile search bot, resulting in some page requests with a very weird agent string:
Nokia6682/2.0 (3.01.1) SymbianOS/8.0 Series60/2.6
Profile/MIDP-2.0 configuration/CLDC-1.1 UP.Link/188.8.131.52.0
(compatible; Windowns CE; Blazer/4.0; PalmSource;
MOT-V300; SEC-SGHE315; YahooSeeker/MA-R2D2;
mobile-search-customer-care AT yahoo-inc DOT com)
Now that is a very interesting device!
Yahoo! has been able to combine some of the most popular mobile phones into a single device and run several operating systems on it simultaniously!