"Setting IM hours" and other good ideas for telecommuting

Klint Finley has a fresh-stuff piece on telecommuting on ReadWrite. Remote Work: Pitfalls and How to Avoid Them has a good starter list of pitfalls with some quick fixes:

1. Missing out on hallway conversations: Use email and intranet more
   
2. Lack of responsiveness during [conventional] working hours: Make hours explicit; set IM "on" hours
3. Morale: Regard telework as benefit

Others?