You are right, Aspen University is accredited by the DETC:
http://chea.org/search/actionInst.asp?CheaID=3202eLearners also has some good info about accreditation:
http://www.elearners.com/resources/accreditation.aspQuick note: there are some places which consider a "regional" accreditation to be more reputable than a "national" accreditation (nothing is technically "federally" accredited since the US Govt does not accredit any college or university). Usually, the standard is if a school is listed in CHEA's [The Council for Higher Education Accreditation] database:
http://chea.org/search/default.asp . If you plan to transfer college credits to another school, you may have an easier time transferring credits from a regionally-accredited school than a nationally-accredited school.
You also have to be careful about state laws related to listing your academic accomplishments on your resume. For instance, the State of Oregon has strict laws about only claiming degrees from schools that their Office of Degree Authorization has approved (else adding a disclaimer about schools they don't approve):
http://www.leg.state.or.us/05reg/measpdf/sb1000.dir/sb1039.intro.pdf
http://www.osac.state.or.us/oda/I don't believe that there are any states which prohibit degrees from a nationally accredited school as opposed to a regionally accredited school, but please check with your state government about that.