had an hour left, just built the cifs.ko for the pr1.1 upgraded kernel. I'll attach the module, however be warned that all I tested up to now is that it can be loaded with insmod. I have no samba share here at the moment, so was unable to actually test mounting something. Also it's not loaded for 5 minutes, it could easily happen that the system will reboot in the next minute...
So, all in all it's pretty untested. Let me know if it should work for you (or not).

Howto use it:

o copy the cifs.ko to your device
o load it using this command (as root):
insmod cifs.ko (this i tested and it worked)
o mount some remote cifs/smb share (as root):
mkdir /home/user/Mydocs/share
mount -t cifs //server/share /home/user/Mydocs/share -o username=<username>, password=<password>
(this has not been tested with pr1.1 - however it worked fine with pr1.0)

Hope that helps.

Err. I have some problem uploading the file and need to catch a train. Will try later again.

Edit: problem isthat the module is too big to be attached here. cifs.ko is 2.8mb, as .tgz it's still 1mb. I'm not allowed to attach that big archives, so I'll just put it into garage.maemo.org when i have some more time. I'd then like to do it as proper package, so it won't happen immediatly.