I just Googled, and it appears there should be a soft sign (myaki znak) after the final "c".

Craig in Arcata

As far as pronunciation is concerned, it sounds a lot like its East Slavic cousins -- more like Ukrainian than Russian, in that there's no 'g' sound, and the equivalent letter is pronounced like an h. But, then again, there's the distinctly West Slavic-sounding 'u kratkaia,' like the Polish crossed l, that imparts a /w/ sound.

Byel- is byel- for white throughout the East Slavic world, as far as I know, and Belarusian historians are fond of pointing out that the concept of Rus' (see Kievan, etc.) as a Slavic polity predates or is distinct from the concept of Rossiya. Whether this is just nationalist fabrication I couldn't say. I've never seen a Russian-language document referring to Byelorossiya anywhere that I can think of, just to Belorusskaia respublika.