Howto post a comment online (must beat the 12-July deadline!):

Go to http://www.regulations.gov/

Follow the directions:

Step 1: the default is documents accepting public comment;
Step 2: Choose agency: scroll to the O's for "Occupational Safety & Health Administration";
Step 3: Narrow search by document type: Choose "Proposed Rule";
Step 4: Select Category: "Document ID" then type in "OSHA-2007-0032"

HIT SUBMIT

Click on Document ID: OSHA-2007-0032

This takes you to a new screen, it should be the first document OSHA-2007-0032-0001 that is the first document, click on the yellow comments symbol to the right, under the header "Add Comments".

This brings you to the comment screen fill in the appropriate information fields, fill in comments or add attachments and when you've completed that,
HIT NEXT STEP
I also wrote my congress critters (by fax since snail mail is delayed by days in Washington while they irradiate it).