E means Coppermine.
B means 133 MHz bus.
For everyone knocking the Celeron @800, if you buy the 533A Celeron and OC, you are getting some good performance for a $60 CPU.
At the time I bought my Celeron 533A, P3s were still quite expensive. At today's prices, it is hard to pass up the P3-700. So, it all comes down to what you want to spend.
Jeremy806