I am sorry but do people realize how childish and self absorbed you sound when you whine about no new builds? There are good reasons for the delay. To put it simply they are attempting to deal with some serious bugs in 10130 that need to be fixed. The nature of some of the driver complaints here, Windows Update errors, and the content of recent Windows Update pushes from Microsoft should make that obvious. This is also not speculation on my part since I am aware of one particular bug related to data syncing on which I have been working with people from Microsoft.
You are all aware that the actual goal here is not to provide you with new toys but to beta test the new OS? There is simply no point to releasing a new public build until they fix major issues with the current one. The only thing to be gained by doing otherwise is to risk cascade errors on a larger pool of machines and/or create cumulative issues that could threaten the overall schedule. Private builds are private for a reason. They are not meant for wide spread testing which means use can have unintended consequences and feedback can end up being on dead end elements not targeted for the 7/29 release. Use at your own risk or wait for a bug fixed new public one from which they can build feedback to meet their release schedule. BTW, if people would provide Microsoft with actual detailed feedback with screenshots and clear information regarding how to replicate errors, instead of the whining, non-specific bug complaints, and one-line waste of bandwidth responses drowning the feedback system, you might see new builds more frequently.
A new build should be out soon. Take a deep breath, exhibit some patience, and wait for it.....