This wiki references the dwl-g700ap as having a Realtek RTL8186 soc. I do not believe this is the case. I have a dwl-g700ap HW ver: A1. No where in this device is a Realtek RTL8186. This device for this particular hardware version is based off the Marvell 88W8000 soc. The D-Link support website makes no mention of other hardware versions. Since the majority of contributions appear to be Russian or Brazilian perhaps there are differences based off county? I don't know. There should be clarification on this.
RDT Multimedia SoCs from Realtek have MIPS core
At least one such player (Mvix Ulteo) was opened physically and showed http://www.avsforum.com/avs-vb/showpost.php?p=16784510&postcount=82 RTD1073DA chip. Combine this with various mips_le targeted tools in http://www.mvixusa.com/support/index.php?_m=downloads&_a=viewdownload&downloaditemid=50 and you arrive to same end: it has MIPS core. Especially interesting full source code for kernel 2.6.12, included in http://files.getdropbox.com/u/397941/Ultio%20Files/Ultio%20Firmware%20and%20Sourcecode/RealTek_GPL.tar.gz
Other chips like RTD1261/2 according to unofficial info, have MIPS32 MIPS 4KEc version 6.4 core http://rtd1261.wikidot.com/internals