I guess the question is how desperate are you to get it on the marketplace?
Currently if you were to release it as is and then release an update later … you could wait up to 3 or 4 weeks to see the update appear on the market place. If you delayed by a week and then did a release … you probably get more people buying it as there are very few network enabled inventory systems around.
Maybe you should submit it so long, continue to work on the network support … by the time it goes through the voting process … you will probably have finished the networking and can then release a new version.