My Wife is Indonesian and I've been trying to learn the language since I met here.  It seems to be relatively isolating - verbs don't change for tense/aspect/number, nouns don't change for numbers, and a lot of meaning is carried by particles rather than affixes. Yet a few of the most useful sentences for me are single words - "Kucintaimu." and "Kurinduinmu", "I love you", and "I miss you" respectively. Guess that proves your point about there not being enough categories down the isolating end.,(reply>), (Standard) Indonesian is actually considered agglutinative - much like its Austronesian brethren up north - especially when you consider the range of derivational prefixes, suffixes, and a couple of circumfixes. Also, there are particular inflectional and derivational affixes on verbs. Now that's for the standard variety (bahasa baku); as for the local spoken varieties, many of them tend to be more isolating than anything else.