ive learnt a few ways of making it less boring.
1) a bit vain, but i put a full length mirror in front of me so i can see myself riding, then i practise my victory salutes.
2) stick it outside on a clear night and enjoy the view of the stars.
3) since i won my spanking new flat screen TV in the acc raffle i have set it up and play tour de france videos whilst riding, i can do an hour and it only feels like 5 mintues, even riding hard!