Re: Llorean--I think adding TSOP/XSOP support would be great. But let's not forget Vorbis (and its different method, mentioned earlier)!
Others: Although it is ultimately a personal choice whether or not to use a standard organizational system, omitting "a" and "the" is very standard thing to do. It's not confusion over definite articles and proper nouns--bookstores do it, libraries do it, record stores do it, APA-style footnotes and endnotes do it, and they have done it this way for many many years, long before ID3 existed. I'm probably just more sensitive about it because I once worked in a record store. It's not bad or wrong to file everyone under "T", but a standard organizational method does exist, and that's not it.