So, first off, I know that this is all voluntary, and if I ever passed the strict rules for being an editor (believe me I have tried) I would help you people out.
Thank you for trying. We appreciate the effort, definitely.
As far as getting your site reviewed in this category, there is nothing more you can do. You have made the suggestion have the site added to the category. You can do no more than that.
Is there really a back-up in this category which is taking a year+ to work through?
Yes, there is. There are not many editors who feel comfortable or have the time to edit in this area, so yes, the wait might well be long.
Would I be best served by resubmitting?
Not to that category, no. In fact that could possibly delay the site being reviewed for inclusion in the directory.
However, I do have one suggestion - because your company is located in San Mateo, California, you might also be considered for a listing in the category
http://dmoz.org/Regional/North_America/United_States/California/Localities/S/San_Mateo/Business_and_Economy/ you might find that a review there might be quicker, and submitting there should not jeopardise the review in the category about which you enquire.
I don't want to criticize, because the ODP is a great tool and a great community of editors. But somewhere, a line needs to be drawn.
OK, and what line do you think it reasonable and (above all) practical to draw? We are all volunteer editors and we use our editing time as we wish.
Is the editor not working this category anymore?
There is no NAMED editor for this category, but there are upwards of 100 editors that could edit this category.
Hope this helps claify the situation.