Im gonna go outta order.. sorry if its inconvinient.
your prompt of [root@excelinux] means that you are loged in as linux. and that your computers hostname is "excelinux".
I know that "netconfig" will allow you to defin your host and workgroupname. I trust that you are aware that if they linix box's and the windows box's workgroup name isnt exactly the same, they wont see eachtother, so make sure that they are the same.
#3) If you cant see the nix box on the workgroup, theres no way your going to see its shares.
Now... Im curious, do you have or have you set up samba users? if not you may try creating one and try it after youve confirmed that your comps are running on the same workgroup.
Try using those tips, and report to me with what you find or have probelms with. I shal
and help you more when youve done this.