I would make multiple RPC/ajax calls. First one, get the total, 
by figuring out how many keys exist for your query. Then divide up the total 
make multiple calls and query the data in chunks and then buffer it into a 
list or array on the client using javascript.  Do you think that would work 
for you?

Brandon Donnelson
http://gwt-examples.googlecode.com
http://c.gawkat.com
Challenge is to: Spice up the java forum with some profile pictures, lets beat 
the python community. :)

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