InfoPath Dev

Hi, I am designing an InfoPath 2007 form which has a repeating table that contains two rather large Data connections linked to SharePoint lists. The trouble is, when inserting additional rows this gets slower and slower the more I try to add. Is there any way I can speed this up? I was thinking i maybe...

Background: This form library is large. Users enter a high number of forms in a row many times a day. Within 1 year you can expect to have about 8,000 records, which then closes the library. Because of the large number of records, the default SharePoint view for the list needs to be grouped and limited...