The just-released Mailplane 2.1.6 from Uncomplex adds built-in support for the highly interesting Rapportive plug-in (see "Rapportive Plug-in Replaces Gmail Ads with Sender Info," 27 March 2010). Mailplane 2.1.6 also now works with the Share > Send via Mail menu items in the iWork '09 applications. With them, you can email your document via Mailplane in its native format or as a Word, Excel, PowerPoint, or PDF document. A few minor bugs have also been fixed, some of which were related to Gmail changes. ($24.95 new, free update, 6.7 MB)
Just Show Me the Pictures!
Do you ever find that you don't have time to read those long email missives from Aunt Carol, but really do want to see the photos that she has lovingly attached? In Apple Mail, click the Quick Look button located in the message header. You'll get an easily browsed view of just the attached photos, and you can even add them to iPhoto, if you like!