I have an app running on Heroku. Interestingly, it caches itself using HTML 5 application cache, so most people won't even notice the site is down. Need to make sure the background network ops are fault tolerant though.
That is really awesome. I just got back from playing with it between Chrome on an old 800MHz P-III (very usable) and an Android (Nexus One). On the Nexus, I went off-line (airplane mode), edited, and then went back on-line. MAGIC! My edits showed up in my Chrome browser on the desktop.
My use case is that I want to use Google Docs (or equivalent) to keep notes while on-line and off-line. MotoDiary ain't quite there yet, but it has the hard part (IMHO), the on-line/off-line syncing. What is rough is text size and fixed(?) edit box size on the Android. Also (obviously), it is diary-oriented (single entry per day) rather than supporting multiple documents.
Google Docs are totally uneditable (?WTF!) on Android, never mind doing it off-line and syncing.
There are some Apps that work better, such as GDocs. GDocs has been a mixed bag, it allows me to edit off-line and sync docs, but has been iffy in terms of success rate. It definitely isn't as smooth as my brief experience with MotoDiary.