Firewing for PIC18, PIC24 and PIC32 is now available! The free compiler software can be downloaded from here:
http://www.firewing.info/pmwiki.php?n=Firewing.Download
The main boards can be purchased from here:
http://www.mecanique.co.uk/shop/index.php?route=product/category&path=71
...and Arduino compatible shields can be purchased from here:
http://www.mecanique.co.uk/shop/index.php?route=product/category&path=72