TingedAce released a new version of XNand Healer GUI – an app that started off as an uncrippling tool but now morphed into a general purpose NAND dumping tool that should really aid the first part of the JTAG'ing process.
What's new/fixed:
* Supports Multiple Reads in one go
* Escape to cancel analysis
* Changed default read length option from 66 to 64
Official Site: http://www.rigid360.co.uk
Download: here