Re: Network newb - VLAN's subnets (long)

You should certainly investigate the implications of moving to a
subnetted environment.

Key to this is that Windows NETBIOS broadcast traffic will not traverse
VLAN boundaries and thus you will have a need for WINS or DNS

Are the access switches all homed to a core layer 2 switch (3508G ?) ?

If so then this could be changed out with a solid layer 2/3 switch that
would allow you to subnet if and when required. Suggest you familiarize
yourself with the Cisco 3750G-12S layer 3 switch. This would provided
an adiitonal 4 fibre GE ports along with the ability of stacking
another 3750G to it thus providing a nice growth path.

.