Cisco – Unable to access VPN from inside network (Cisco ASA)

I'm using an ASA 5510 for a large network containing multiple subnets, some of which (wireless) have limited network access. I'd like to allow the wireless users to be able to VPN in for full network access, however none of the hosts on the inside network are able to connect to the VPN, or even ping the ASA external interface.

I'm assuming this has something to do with my NAT rules getting in the way. Can anyone point me in the right direction?

Here's the running-config (sanitized): http://pastebin.com/snN4AVSA

packet-tracer ping from inside to outside: http://pastebin.com/hX8X8kTr