Workaround for people who are not afraid to use the commandline:

gconftool-2 --set /system/osso/connectivity/IAP/NEWAPNNAME/type --type string "GPRS"
gconftool-2 --set /system/osso/connectivity/IAP/NEWAPNNAME/name --type string "NEWAPNNAME"
gconftool-2 --set /system/osso/connectivity/IAP/NEWAPNNAME/gprs_accesspointname --type string "internet.example.com"
gconftool-2 --set /system/osso/connectivity/IAP/NEWAPNNAME/ipv4_type --type string AUTO
gconftool-2 --set /system/osso/connectivity/IAP/NEWAPNNAME/sim_imsi --type string YOURSIMIMSI

to get the SIMIMSI:
gconftool -R /system/osso/connectivity/IAP |grep sim_imsi

Not sure if all the above commands are neccessary, but after running that you
can edit "NEWAPNNAME" in the settings