[Openstreetmap] recording heights?

[Barry Hunter]

I haven't seen any mention of it anywhere, but does openstreetmap.org make 
any attempt to record heights?

Most of the tracklogs uploaded probably have a height component, but am I 
right this doesn't really make it into the main database?

This would be a great opportunity for creating a DEM from the data, even 
given the low quality of height readings on a GPS device.

Or is the focus just to merge the mapping data with already available DEM's 
(such as STRM on free-map.org.uk)?

Thanks,

Barry Hunter