I've done my CIFS connection.
I lacked CIFS kernel module at my debian box.
After selecting this in kernel - I'm able to acces my shares.
I use OS2007HE on my 770 - insmod'ed kernel cifs.ko module from
Fanoush set: modules-2.6.16.27-omap1.tar.gz then mounted my
remote directory.
I have to browse around for some solution how to set uid or something more in mount parameters to have write access enabled for gui user since now it works only for root from the command line at the tablet side. I can't upload anything using gui-filemanager.

Conclusions:
"Updating" baloon - when opening big share makes me dizzy because it takes quite long.
Performance - when "streaming" over wifi - even small video (320x240 divx or mpeg1) - mplayer output is far from being smooth.
CIFS itself eats up to about 30% of the cpu time (as reported via top command).