Looking around on the Android Market, I have come across many reviews for my and other apps that proclaim that Airpush ads are malware.
Airpush is not malware. Think about the Groupon or LivingSocial apps that have been created for Android. Every day you'll get a message in your notification bar that alerts you to some deal in your area...$20 for $40 worth of sushi, 30% off dry cleaning, and so forth. You're not obligated to sign up for the deal. If it's something you're interested in, you click on the notification. If not, you clear it and don't see it again.
Airpush is really the same concept. It will put an advertisement in your notification bar. My apps do it only once a day (other developers may vary). If you're not interested in what the advertisement is showing, you clear it, and you're not bothered again by it.
You could equate Groupon or LivingSocial to malware because they're putting ads in your notification bar, right? No - it's not malware because it's coming from companies that we're all familiar with...
Look - I enjoy creating Android apps. I do this as a hobby. I also enjoy seeing a return from my efforts - I don't look to give things away for free. Don't categorize these Airpush ads as malware, spam, etc. Airpush ad yields are key motivating factors to continue the development process.
I welcome your comments - if you don't agree, let me know.