FIRST: Please see attached PDF (2 pages) for specifications and examples etc.
Here is a list of things that will very likely get your design rejected, and possibly yourself eliminated from the competition. Almost all of these have been in the competition comments for some time, but many designers are ignoring them. Please read the comments.
1) Do NOT put a mirrored 't' at the end of 'tibdit'
2) Do NOT have a bubble or shading which simply separates 'tib' from 'dit' in the word 'tibdit'
3) Do NOT use speech bubbles - we are a micropayments company
4) Do NOT use script typefaces or italics
5) Do NOT join the 'i' to the 't' in 'dit' making 'tibdit' read like 'tibdirt'
5) Do NOT use a simple lower-case t for the icon - the icon needs to be very distinctive
6) Do NOT try to make a face out of the bd - we need to appear professional
7) Do NOT use very casual typefaces - we need to appear serious (without being boring)
8) Do NOT use 't's with really long tails - it breaks the symmetry to much
9) Do NOT use deco typefaces with bulbous 'b's and 'd's - it makes the gap in the word too big
10) Do NOT use upper case - it's "tibdit"
11) Do NOT make the i virtually disappear between t and b,
12) Do NOT do anything else that seriously impacts readability of 'tibdit'
12) Do NOT mis-spell 'tibdit' - typically as tibdid - not a great first impression
13) Do NOT rip ideas from the four-star group - I think we've got the t+dot thing well covered already.
14) Do NOT use the 't' in a standalone way that makes it look like a religious symbol
15) Do NOT join up letters in a way that makes 'tibdit' at first glance look like it's in Arabic.
Of course, all of these are really guidelines, if you think you can do something really impressive that requires not following some of these, then please go ahead, just be aware that you are taking a risk.
It will help you if you show me both 'tibdit' (one word, name of company) and 'tib' (our product) - a lot of designs are heavy on styling the bd, without giving any indication how that will work as 'tib'