once you have it setup, why not make a simple script to mount it at boot time?
I have a script (that checks which WLAN the MBA is hooked into first) and then issues the following;
mount_smbfs //10.10.10.10:/public Desktop/NAS
<where 10.10.10.10 is my NAS IP, :/public is the NAS share folder and Desktop/NAS is an empty directory used as a mount point>
Save the script as a .command file (eg I have in my home folder mount_nas.sh.command) and in system prefs/users/login items > add it to be run.
Thats my solution, there is probably a simpler one, but I am a unixy person so this makes simple sense to me