Graphical programming for PICs?

Are there any facilities for programming PICs in a more graphical way,
e.g. flowchart-like or data flow model?

Having gained a good working knowledge of PIC assembly language and a
fair amount of C, and previously worked with LabView in another life,
I'm interested to know if/how PIC programming could be more visually
luxurious. Sometimes I just need to quickly wire up virtual processing
blocks visually in order to do some specific algorithm, and not have to
worry too much about cherry-picking from code libraries.

Yes, I know that higher level languages can be more inefficient, but
that's not my point here.

Thanks,
Matt
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