Everything appears to work succesfully when I upload to Google base except after Google base is done processing it only has 18 products. The XML file I uploaded had at least 75 products in it though.
 
Any ideas?

Technkl - I had the same problem. As it turns out, there were some "&" in the Category names that Google choked on. Viart modified the PHP to put in blanks (I subsequently changed that to a "-" for readability). I also had some problems with blank titles and descriptions, which Viart also addressed. Now, about the only problems I have with Google Base is that I have some long titles and the like - which is up to me to fix. I insert over 3,000 products and all but a couple hundred make it.

Google Base also does not like apostrophies I had to chage "it's" to "it is" so I did not get character errors after processing file.