Spotted this post from Garry Lancaster on CSS last night. To save me some time, it's just gonna be a cut-n-paste:

"
At long last I've got around to updating the +3e ROMs!
I hope you'll agree the new version (v0.87) was worth waiting for; there are a large number of useful changes, including:

• full support for two IDE drives
  
• additional compatibility with some previously unusable drives
  
• new commands for renaming partitions and showing current drive mappings
  
• ability to map floppy drives and RAMdisk to any drive letter (yes, you can now have your 3.5inch external drive as A: and the 3inch internal drive as B: if you want!)
  
• extensions to several commands so that drive mappings, default drive, Editor/BASIC colour schemes etc can be automatically set up each time you turn the +3e on
  
• improved boot speed for single-harddisk systems
  
• several fixes to minor +3 problems
  

You can get the ROMs and full details from the new website (don't forget to update your links/bookmarks!) which is now at: http://.../zxplus3e/
Enjoy! (And don't worry - the next release is being worked on already!)
"

There. Looks quite interesting. After the recent photos of it, and seeing some of the comments in the newsgroup, perhaps I'll try modding one of my +3's.