I was able to retrieve my cSuneido code from the SourceForge Subversion repository, but I didn't manage to get the jSuneido code from Mercurial. (It may just have been really slow. Or maybe it was trying to download the history?) So I just copied my source directory to Dropbox and pulled it from there.
I used it a few times while I was traveling recently and it worked well. For example, I'd get an email from my staff asking what a particular error message meant and I was able to find it in the source code and see where it came from.
Textastic is somewhat compatible with TextMate. I have a copy of TextMate on my Mac but I don't actually use it much since I tend to work in Eclipse.
From my limited use, I'd recommend it. It's not free, but for $10 you can't go too far wrong.