(A big thanks to scuzzy and Western Rose for working on this.)
Here is the HTML you can use for blogs (at least wordpress blogs). Your blog readers can click on the image and be linked directly to Project Appleseed's home page. The images below do not represent the actual size of the side bar button.
copy/paste what is below, starting with the <br /> all the way to the end, <br />
(https://lh6.googleusercontent.com/_M6QaJLhd_30/TWvxPatx9WI/AAAAAAAAAgg/mfky0_aA8OQ/s288/Sticker_Sq_RedCoat-Copy.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/Sticker_Sq_RedCoat-Copy.jpg" width="180" height="194" /></a></center><br />
(http://i879.photobucket.com/albums/ab354/April191775/Sticker_Sq_Flag-Copy.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/Sticker_Sq_Flag-Copy.jpg" width="180" height="194" /></a></center><br />
(http://i879.photobucket.com/albums/ab354/April191775/AS_Sticker_Comp1-Copy.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/AS_Sticker_Comp1-Copy.jpg" width="180" height="180" /></a></center><br />
(https://lh4.googleusercontent.com/_M6QaJLhd_30/TWvvpQ0PADI/AAAAAAAAAgU/2c-SciNEVWA/RWVA_Logo_green_180w.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://appleseedusa.org/banners/RWVA_Logo_green_180w.jpg" width="180" height="235" /></a></center><br />
(https://lh5.googleusercontent.com/_M6QaJLhd_30/TWvvpC71ACI/AAAAAAAAAgQ/kamtpDO3pwc/RWVA_Logo_white_180w.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://appleseedusa.org/banners/RWVA_Logo_white_180w.jpg" width="180" height="238" /></a></center><br />
New promo photo:
(https://lh4.googleusercontent.com/_M6QaJLhd_30/TWvvz5Jd0aI/AAAAAAAAAgY/1MGu35YvHOw/s640/HalfPage_comp2.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://appleseedusa.org/banners/RWVA_Logo_girl_180w.jpg" width="180" height="119" /></a></center><br />
(http://i879.photobucket.com/albums/ab354/April191775/LadySeed1.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/LadySeed1.jpg" width="180" height="181" /></a></center><br />
(http://i879.photobucket.com/albums/ab354/April191775/LadySeed2.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/LadySeed2.jpg" width="180" height="180" /></a></center><br />
(http://i879.photobucket.com/albums/ab354/April191775/LadySeed3.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/LadySeed3.jpg" width="180" height="181" /></a></center><br />
(http://i879.photobucket.com/albums/ab354/April191775/LadySeed4.jpg)
<br /><center><a href="http://appleseedusa.org/"><img src="http://i879.photobucket.com/albums/ab354/April191775/LadySeed4.jpg" width="180" height="180" /></a></center><br />