You can also create your own networks and use some PHP code to get something more powerful than sitewide links.
STEP 1: Create several autoblogs that promote themselves (look for an autoblog guide, there are many on this forum)
STEP 2: Install on each blog a wordpress plugin called "Post Layout"
STEP 3: In your post layout settings put this code in one of the locations (I suggest the top location)
PHP:
<?
$randomtext_text = array(
"Your 1st Targeted Keyword",
"Your 2nd Targeted Keyword",
"Your 3rd Targeted Keyword",
"Your 4th Targeted Keyword",
);
$randomtext_urls = array(
"Your 1st URL",
"Your 2nd URL",
"Your 3rd URL",
);
$sizeoftext = count($randomtext_text);
$randomtext = (rand()%$sizeoftext);
$sizeofurls = count($randomtext_urls);
$randomurls = (rand()%$sizeofurls);
$bold = (rand()%3) == 1;
$italic = (rand()%3) == 1;
$h1 = (rand()%10) == 1;
if( $h1 ) echo "<h1>";
if( $italic ) echo "<i>";
if( $bold ) echo "<b>";
echo("<a href='$randomtext_urls[$randomurls]'>$randomtext_text[$randomtext]</a>");
if( $bold ) echo "</b>";
if( $italic ) echo "</i>";
if( $h1 ) echo "</h1>";
echo " ";
?>
Just replace the keywords array with your keywords, you can put as many as you want and also replace the URLS array. You don't need to have the same number of keywords than the URLs.
What it will do is pick one keyword randomly and use it as anchor text to link to one of the random URLS in ALL your posts.
If you setup good autoblogs you can very quickly have thousands of pages link to your selected URLs.
Vita Vee