SonicWall NSA250M, PowerConnect 5448, SonicPoint-NDR and VLAN Configuration

Hi~

I'm having some troubles with VLAN configurations.  I'm fairly new to VLANs and am not a full-time IT professional, but am an Engineer who has inherited the tasks, so I'll try to explain what I am after the best I can.  Any help with this configuration would be greatly appreciated.  I've been on this for over a week.

Equipment:
Dell SonicWall NSA 250M
Dell PowerConnect 5448
Dell SonicPoint-NDR
Dell SonicPoint-NDR

I am trying to setup:
-  a LAN (which already works)
-  a guest wifi network on a vlan with internet access only and gets DHCP from the SonicWall
-  a corporate wifi network that gets DHCP from the LAN (I don't want this on a separate VLAN as I want the DHCP scope to be the same as other LAN devices)

I have my SonicWall configured as:
X0            LAN                            10.0.0.1                255.255.0.0
X0:V10    VAP_GuestWiFi       10.10.0.1              255.255.255.0
X1            WAN                          

Virtual APs:
Corporate WiFi                  No VLAN ID (I think it defaults to a VLAN ID of 0, could that be a problem since my PowerConnect seems to default to VLAN ID 1?)
Guest WiFi                         VLAN ID 10

My PowerConnect ports are configured as (I know the ports are poorly chosen, but I'll fix that later):
Device                   Port        Port VLAN Mode     Customer VLAN
SonicPoint #1      3             Access                     10:UnTagged
SonicPoint #2      40           Access                     10:UnTagged
SonicWall X0       46           Trunk                        1:UnTagged
                                                                                 10:Tagged

With this configuration:
-  My SonicWall and SonicPoints can communicate and be provisioned
-  I cannot get an IP from the Guest WiFi and therefore no internet connectivity
-  For some reason, my Corporate WiFi gets a 10.10.0.x IP address, the type of IP address I would expect on my Guest WiFi, and has internet connectivity, but no LAN connectivity as it's on the wrong subnet

I feel like I'm just a setting or two away from that eureka moment, but I can't figure it out.  I have changed port types, tagging, VLAN IDs, all without helping.  Different configurations do bad things like complete inability to get IP addresses, blocking communication/provisioning between the SonicWall and the SonicPoint and blocking internet traffic from my LAN to my SonicWall.  I'm happy to provide other information and screenshots as necessary to get this figured out.

Thanks.

--Mark