Google Froogle Feeder has been found to be incompatible with Zen Manager. Zen Manager is a script for adding products to your store. Somehow, the manager stores products slightly differently and the Google Froogle Feeder is unable to pull these values. I verified this on a store that could only produce the first line of the feed (non database values). We created a product the regular way and the product was added to the feed without a problem. Thus, the feeder was not timing out at all.

However, there may still exist a timeout issue which a workaround, although not ideal, is being implemented for v1.3.6. I'll have it ready for testing tonight.