You have two options:
1) Apply for the Returning Resident Visa. June 2009 is only 16 months ago, which is much less than 2 years. If you genuinely had a difficult circumstance that prevented you from returning to the US, and you have documented proof (e.g. hospital records for yourself or a family member) you'll most likely get the visa. However, if it is rejected, your green card is dead and you won't be able to get a tourist visa. But if you have a USC spouse, they could file for a fresh green card and you would redo the whole GC process and return in 6-9 months.
or
2) Surrender the GC at the consulate with form I-407 and apply for a tourist visa. Unless you have a spouse or fiancee in the US, getting a tourist visa is usually very easy after surrendering the GC. You can even surrender it and apply for the tourist visa in the same visit to the consualte.