Hi all,

I wonder what is curently state-of-the art in serial high-speed transmission 
and what are the prevailing data rates? I know about some SerDes in the 
gigabit-per-second range but I cannot imagine if 10 Gbps are really a 
challenge or the applied method or if it's 1 Gbps (or something in 
between)...?
I recently heard about some 60 GHz in the mobile communication sector and 10 
Gbit Ethernet but as far as I know there are those multi-level modulation 
methods (like QAM for example) that are able to provide 10 Gbit bandwidth 
with a bitrate of some Mbps (is that correct?).
I'm not interested so much in those higher modulation methods (nor in 
optical transmission) but in the baseband communication where bitrate = 
clockrate, i.e. the line rate. What can be efficiently transmitted today 
electrically (over wire or PCB)? What is the prevailing technology of those 
circuits, is it CMOS or are there alternatives?
I am a senior electrical engineer and unfortunately did not manage to keep 
up-to-date. After googling all night I'm really depressed because I finally 
couldn't find an unambiguous answer.
Maybe some guys in the silicon-business or practitioners know the anser and 
are willing to share there knoledge with me?

Best regards
Geronimo