for me, ALEKS was love at first sight, it was tremendous help in my College Algebra prep. However, documenting credit for me was a bit of messy process. You'll need to complete the course (100% of pie chart), register at ACE in order establish a transcript and then ask ALEKS to send ACE a letter stating that you completed the course. I winded up taking the CLEP College Algebra to fulfill my requirements.
I don't know about the math requirements of the liberal degrees at Excelsior, but I'd verify that Beginning Algebra is acceptable with Excelsior (for example, they won't take anything beneath the pre-calculus level for the business degrees), otherwise you should have no problem transferring ALEKS credit (provided you're lucky enough to be able to complete the credit documentation process).
Have a look here for a discussion about ALEKS credit:
http://www.instantcertonline.com/for...html#post25532
Good luck!