The current project home page provides a list of additional modules that expand or augment the features provided by jammer. This list could be updated to remove unsupported/unstable modules and to add D7 equivalents where they exist.

Here is the current text:

For jamming various user deletion options, see Protect Critical Usersor for other options in hiding configured fields, see Formfilter and Preview. For messages see Disable Messages.

These are all D6 modules except for Disable Messages (which has stable versions in both D6 and D7).

You might replace that note with the following:

For jamming various user deletion options, see Protect Critical Users (D6 only) or User Protect (D7 only). For other options in hiding configured fields, try Field Permissions, Formfilter (D6 only), Preview (D6 only), or Rules Forms Support (D7 only). For controlling messages see Disable Messages.

Alternatively, you can remove suggestions in that list to any unmaintained, questionably maintained, or unstable modules. That would leave you with:

For jamming various user deletion options, see Protect Critical Users (D6 only) or User Protect (D7 only). For other options in hiding configured fields, try Field Permissions, or Rules Forms Support (D7 only). For controlling messages see Disable Messages.

If you accept one of these edits, then I would recommend rewriting the note about the jamming the Preview button as well. I would remove the special "Drupal 7" note and integrate the note about the Preview button into the main description immediately below this paragraph. It is strange to have a separate note about D7 that only addresses that single item.