Modules for the N5200/N5200Pro (should also work on the new N4100Pro, N7700 and N8800 as I believe they share the same base platform architecture)
http://www.onbeat.dk/thecus/index.ph....3E.3D_1.00.06
For more on the module development have a look at the Thecus user group:
http://thecususergroup.proboards106.com/index.cgi
I haven't had any reliability problems with eiher of my N5200s. Was running firmware 2.00.04 but recently moved to 2.00.08 along with the Perl, SqueezeCenter, and SSH modules.