It's as bad as Vista on sharing a network. I had Vista Ultimate and W7 RC for several weeks. I never did get them to play nice. Just my two cents, hopefully someone will chime in and answer the question.
I would like to add my new windows 7, 64 bit machine to my W98SE, peer-to-peer ethernet network. Three machines and multifunction printer are connected by a Linksys WRT54G router. (Another 98SE connects remotely to one of those, via PCAnywhere.) I have created a share, set full permissions for "everyone" on W7, and all are in same workgroup.
W7 machine can access the network printer, see, access, and share folders on the W98 machines. W98 machines can see, but cannot access W7, either from Network Neighborhood or "run" command. I do not run a firewall on W7 as yet. My XP Pro laptop CAN wirelessly share with both W98 and W7 machines. I have identified NTLM v.2 as a potential cause, but following MS instructions to download and activate same on one W98 box changes nothing.
I appreciate any suggestions from those more knowledgable than I. I am already considering replacing all W98's. Thanks!