I was asked if it's possible to use iframes as distorted hotspots in krpano.
Here the answer directly for everyone:
There is currently not 'direct' support for including html elements (but that's already planed), so this will require a 'temporary' hotspot image (can be any small image, e.g. a small 8x8 black or transparent image) to get the hotspot itself created.
Here an example:
and here the xml code of that example:
This could be also used to add any other html content. Only two things to respect - the size need to be set and this will work only in HTML5.