The rumor mill is heating up just a bit in preparation for next week's Mobile World Congress in Barcelona, Spain, and this latest rumor is a doozy.  Samsung is said to be readying their G810 for release next week, and this $850+ sliderphone may well feature everything this side of your kitchen sink when it makes its debut.

Unwired View lists the G810 as featuring a 5mp camera with 3x optical zoom and anti-shake and face recognition technologies, along with integrated GPS and WiFi, HSDPA for 3G data access, and 150 MB of internal memory with a microSD expansion slot.  The G810 will reportedly run on Symbian 9.2 with the S60 3.1 user interface and pack a 2.6" QVGA display and 1200 mAh battery into a relatively svelte 18mm thick body. 

If this pans out, Nokia had better be ready to unleash something more than "N95 in a new color!" on the world's high end phone geeks, as the G810 would one-up Nokia's flagship more or less across the board - and do it all in a much more attractive design, too boot.  Let's also hope that Samsung doesn't leave the GSM 850 band and North American-compatible 3G off of the G810 - high-end smartphones have traditionally shipped with European-optimized radios, but Sony Ericsson bucked that trend with their new K850 and W760 handsets, both of which feature US-friendly GSM and HSDPA bands. 

Read more about the Samsung G810 at Unwired View from here.