we have made a free iPhone app for website monitoring.
It checks your website(s) every 50 minutes and will send an alert and or email if the website is unavailable or slow responding. With webconsole for users without an iPhone as well.
Hope to hear what features you want to see added to this...
new one will offer better specs, better performance, better design, better antenna (..) and wil have an EOL (End of life) further in the future. Unless money burns in your hand I would wait.
Apple innovates and creates consumer adopted products of the highest level. You might hate the marketing buzz, journalist hype and so on, but the ipod, iphone and ipad are the best in class. Even the old apple tv has been the best but not (yet) adopted by the market. Apple has changed the MP3...
I have experienced important differences with older iPhones, generating unexpected development challenges. Do recommend to test it carefully since not everyone has the latest iPhone 4
there are hundreds of sites promoting apps, a lot of them accept review requests, but a small change of being noticed. Why not use twitter to send tweets about your app say once a day with different messaging. Also ask family and friends to retweet.