Over a year ago I published the module Aoe_TemplateHints (blog post is german, sorry for that...).
The basic idea was to replace Magento's native template hints with a better solution that
This is when "Aoe_TemplateHints" was born. The block related information was stored in title-tags and would appear on hover. This solution was lightweight and simple. But there were some major usability limitations with this approach: Title-tag content cannot be styled. This led to all information being concatenated and thus not being readable at all. And: text from a title-tag popup cannot be selected and copied into the clipboard.
The template hints will be activated by appending the parameter
?ath=1 to the url or passing this parameter in a cookie. In addition to this the current ip must match the configured dev-ip settings.
The module is available on GitHub. A tar.gz package including modman file can be downloaded from there:
Checkout this screencast for s short demonstration on how this module works: