TUAW has an interesting post covering both the size and cost limits being imposed by Apple on iPhone apps. Whilst the cost will be of interest, I think it is interesting that they are limiting app size to 2gb.
For most users this won’t be a big problem or issue in any way. However, for mobile musicians it may be. Music apps and suites in particular can be very large indeed and I wouldn’t want to think that apps have to limit their technical ability in order to comply with a preset size barrier.
I’d be interested in any developers who have views on this.