In 4 words..."Just don't do it"
There are many problems with them. VirgoHippy and Jugg hit on a couple of the issues. And I've yet to see one that creates a decent looking recip table.
They're just not worth the trouble...and the few sites that do accept auto submits generally won't send much if any traffic.
Get familiar with the sites you submit to...become known on these forums. Don't be afraid to interact with the link site owners you submit to. Once you've gotten your routine down, invest in a good form filler like RoboForm. But always, submit manually so you can make sure no rules have changed. Once you get good at it...submitting doesn't take long at all
