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Warning: Technobabble Alert
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Due to the nature of databases, I would suggest that this feature request be changed to synchronize the openlp database with another location rather than allow a shared database. Unless the plans include connecting to a central machine running a database server, it's not really a good idea.
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In my experience, when more than one computer has read/write access to a database, Bad Things(tm) happen, including corruption, file lock issues, etc. For the same reason, it's not recommended databases in general be open in read/write mode even during file backup operations.
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Okay, here's the paraphrase version
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Using a synchronization solution would accomplish the same thing, just go about it in a safer manner.
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