So I was testing hooks functionality in pbuilder, and from one link to another I found that vim (at least the vim version that comes with Ubuntu) is able to autocomplete LP: # bugs!
To use it:
$ vim debian/changelog or $ dch -i
And then in “LP: #” press Ctrl-x Ctrl-o and it will provide with a list of open bugs of the current package =)
Seems like it’s been a while since this little hack was made: