I went to the SCOTUS web site and did the "obama kagan" search and found 11 results instead of the 9 results mentioned.
Two of the results were posted in the last half of this year and, most likely did not exist at the time of the original email and she Snopes statement.
I did look at the the dockets and, as far as I can tell, they do not pertain to Obama's eligibility question, as Snopes reported.
There were 9 dockets that match the search and they just don't pertain to Obama's eligibility.
One of them involved a firearms possession charge and was filed by a prisoner. Even though Obama was named in the petition, I doubt that the Solicitor General would personally appear for any of the proceedings for this case.
So, from what I have found, Snopes filed an accurate report.
HOWEVER, the last two are interesting.
I cannot determine with what the docket pertains and some dated entries are marked (sealed), which might mean they are not open for public view.
Each one also contains the statement "Justice Kagan took no part in the consideration or decision of this motion"
Don't know what all this means, but the two dockets were brought by the same petitioner.
Kagan was not Solicitor General at the time but was/is a seated Justice.
Here is a link to one of the docket summaries
http://www.supremecourt.gov/Search.aspx?FileName=/docketfiles/10-447.htm