[JamesDB]

Perhaps one that you can take notes/leave reviews on without being connected to the internet. These will then sync when next connected to wifi (like evernote does)

Data romaing charges abroad are massive, and your target audience are travellers.

[ihavetoblog]

It is in the works and your second suggestion is brilliant! Hadn't thought of that. Can also update on WiFi (which is what I was thinking about)

I think it is a little premature for a mobile app as there are a lot of kinks to still get through on the main page and investing time/$$ into a mobile app might be too soon, especially since funding is tight.