Just for the information... Google spiders:- Normal anchor tag links (not javascript) Area tag links (not javascript) Frame sources Google does not spider:- Iframe sources Google recognises ASCII encoded links and spiders them normally as long as they are not javascript.
Just to add on a few more pieces of tidbits... Using urls without query strings will help. static urls work best. You can get wordpress seo plugin for your blog to make it more search engine friendly.