I have heard it applied to all kinds of things the scripture never intended. Communion (that's a stretch), worship, gifts of the Spirit and the Word of God itself using the concept of eating the scroll as a mark.
Not that any of these interpretations are grossly in error, the simply have nothing to do with the context and keep people from understanding why taste and see is such an important nessesity in the life of a believer.
Some who Call on the Name of the Lord Have Never Tasted nor Seen that HE is GOOD
Read the whole thing in the amplified version of the Bible in it's context and then you tel me what it means: Psalm 34:6-14
This poor man cried, and the Lord heard him
And saved him from all his troubles.
The angel of the Lord encamps around those who fear Him [with awe-inspired reverence and worship Him with obedience],
And He rescues [each of] them.
O taste and see that the Lord [our God] is good;
How blessed [fortunate, prosperous, and favored by God] is the man who takes refuge in Him.
O [reverently] fear the Lord, you His saints (believers, holy ones);
For to those who fear Him there is no want.
The young lions lack [food] and grow hungry,
But they who seek the Lord will not lack any good thing.
Come, you children, listen to me;
I will teach you to fear the Lord [with awe-inspired reverence and worship Him with obedience].
Who is the man who desires life
And loves many days, that he may see good?
Keep your tongue from evil
And your lips from speaking deceit.
Turn away from evil and do good;
Seek peace and pursue it.
5 Let your character [your moral essence, your inner nature] be free from the love of money [shun greed—be financially ethical], being content with what you have; for He has said, “I will never [under any circumstances] desert you [nor give you up nor leave you without support, nor will I in any degree leave you helpless], nor will I forsake or let you down or relax My hold on you [assuredly not]!” 6 So we take comfort and are encouraged and confidently say,
What will man do to me?”